diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 83d493c794..96653e0a78 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -4377,7 +4377,7 @@ date_s__strptime_internal(int argc, VALUE *argv, VALUE klass,
  *   Date._strptime('2001-02-03', '%Y-%m-%d') # => {:year=>2001, :mon=>2, :mday=>3}
  *
  * For other formats, see
- * {Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html].
+ * {Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc].
  * (Unlike Date.strftime, does not support flags and width.)
  *
  * See also {strptime(3)}[https://man7.org/linux/man-pages/man3/strptime.3.html].
@@ -4406,7 +4406,7 @@ date_s__strptime(int argc, VALUE *argv, VALUE klass)
  *   Date.strptime('sat3feb01', '%a%d%b%y')   # => #<Date: 2001-02-03>
  *
  * For other formats, see
- * {Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html].
+ * {Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc].
  * (Unlike Date.strftime, does not support flags and width.)
  *
  * See argument {start}[rdoc-ref:calendars.rdoc@Argument+start].
@@ -4506,7 +4506,7 @@ date_s__parse_internal(int argc, VALUE *argv, VALUE klass)
  * This method recognizes many forms in +string+,
  * but it is not a validator.
  * For formats, see
- * {"Specialized Format Strings" in Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-Specialized+Format+Strings]
+ * {"Specialized Format Strings" in Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc@Specialized+Format+Strings]
  *
  * If +string+ does not specify a valid date,
  * the result is unpredictable;
@@ -4541,7 +4541,7 @@ date_s__parse(int argc, VALUE *argv, VALUE klass)
  * This method recognizes many forms in +string+,
  * but it is not a validator.
  * For formats, see
- * {"Specialized Format Strings" in Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-Specialized+Format+Strings]
+ * {"Specialized Format Strings" in Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc@Specialized+Format+Strings]
  * If +string+ does not specify a valid date,
  * the result is unpredictable;
  * consider using Date._strptime instead.
@@ -4606,7 +4606,7 @@ VALUE date__jisx0301(VALUE);
  *   Date._iso8601(string, limit: 128) -> hash
  *
  * Returns a hash of values parsed from +string+, which should contain
- * an {ISO 8601 formatted date}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-ISO+8601+Format+Specifications]:
+ * an {ISO 8601 formatted date}[rdoc-ref:strftime_formatting.rdoc@ISO+8601+Format+Specifications]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.iso8601    # => "2001-02-03"
@@ -4633,7 +4633,7 @@ date_s__iso8601(int argc, VALUE *argv, VALUE klass)
  *
  * Returns a new \Date object with values parsed from +string+,
  * which should contain
- * an {ISO 8601 formatted date}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-ISO+8601+Format+Specifications]:
+ * an {ISO 8601 formatted date}[rdoc-ref:strftime_formatting.rdoc@ISO+8601+Format+Specifications]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.iso8601   # => "2001-02-03"
@@ -4676,7 +4676,7 @@ date_s_iso8601(int argc, VALUE *argv, VALUE klass)
  *   Date._rfc3339(string, limit: 128) -> hash
  *
  * Returns a hash of values parsed from +string+, which should be a valid
- * {RFC 3339 format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-RFC+3339+Format]:
+ * {RFC 3339 format}[rdoc-ref:strftime_formatting.rdoc@RFC+3339+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.rfc3339     # => "2001-02-03T00:00:00+00:00"
@@ -4704,7 +4704,7 @@ date_s__rfc3339(int argc, VALUE *argv, VALUE klass)
  *
  * Returns a new \Date object with values parsed from +string+,
  * which should be a valid
- * {RFC 3339 format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-RFC+3339+Format]:
+ * {RFC 3339 format}[rdoc-ref:strftime_formatting.rdoc@RFC+3339+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.rfc3339   # => "2001-02-03T00:00:00+00:00"
@@ -4816,7 +4816,7 @@ date_s_xmlschema(int argc, VALUE *argv, VALUE klass)
  *   Date._rfc2822(string, limit: 128) -> hash
  *
  * Returns a hash of values parsed from +string+, which should be a valid
- * {RFC 2822 date format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-RFC+2822+Format]:
+ * {RFC 2822 date format}[rdoc-ref:strftime_formatting.rdoc@RFC+2822+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.rfc2822 # => "Sat, 3 Feb 2001 00:00:00 +0000"
@@ -4846,7 +4846,7 @@ date_s__rfc2822(int argc, VALUE *argv, VALUE klass)
  *
  * Returns a new \Date object with values parsed from +string+,
  * which should be a valid
- * {RFC 2822 date format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-RFC+2822+Format]:
+ * {RFC 2822 date format}[rdoc-ref:strftime_formatting.rdoc@RFC+2822+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.rfc2822   # => "Sat, 3 Feb 2001 00:00:00 +0000"
@@ -4890,7 +4890,7 @@ date_s_rfc2822(int argc, VALUE *argv, VALUE klass)
  *   Date._httpdate(string, limit: 128) -> hash
  *
  * Returns a hash of values parsed from +string+, which should be a valid
- * {HTTP date format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-HTTP+Format]:
+ * {HTTP date format}[rdoc-ref:strftime_formatting.rdoc@HTTP+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.httpdate # => "Sat, 03 Feb 2001 00:00:00 GMT"
@@ -4916,7 +4916,7 @@ date_s__httpdate(int argc, VALUE *argv, VALUE klass)
  *
  * Returns a new \Date object with values parsed from +string+,
  * which should be a valid
- * {HTTP date format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-HTTP+Format]:
+ * {HTTP date format}[rdoc-ref:strftime_formatting.rdoc@HTTP+Format]:
  *
  *   d = Date.new(2001, 2, 3)
      s = d.httpdate   # => "Sat, 03 Feb 2001 00:00:00 GMT"
@@ -4958,7 +4958,7 @@ date_s_httpdate(int argc, VALUE *argv, VALUE klass)
  *   Date._jisx0301(string, limit: 128) -> hash
  *
  * Returns a hash of values parsed from +string+, which should be a valid
- * {JIS X 0301 date format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-JIS+X+0301+Format]:
+ * {JIS X 0301 date format}[rdoc-ref:strftime_formatting.rdoc@JIS+X+0301+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.jisx0301    # => "H13.02.03"
@@ -4984,7 +4984,7 @@ date_s__jisx0301(int argc, VALUE *argv, VALUE klass)
  *   Date.jisx0301(string = '-4712-01-01', start = Date::ITALY, limit: 128) -> date
  *
  * Returns a new \Date object with values parsed from +string+,
- * which should be a valid {JIS X 0301 format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-JIS+X+0301+Format]:
+ * which should be a valid {JIS X 0301 format}[rdoc-ref:strftime_formatting.rdoc@JIS+X+0301+Format]:
  *
  *   d = Date.new(2001, 2, 3)
  *   s = d.jisx0301   # => "H13.02.03"
@@ -6971,7 +6971,7 @@ static VALUE strftimev(const char *, VALUE,
  *   to_s -> string
  *
  * Returns a string representation of the date in +self+
- * in {ISO 8601 extended date format}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-ISO+8601+Format+Specifications]
+ * in {ISO 8601 extended date format}[rdoc-ref:strftime_formatting.rdoc@ISO+8601+Format+Specifications]
  * (<tt>'%Y-%m-%d'</tt>):
  *
  *   Date.new(2001, 2, 3).to_s # => "2001-02-03"
@@ -7252,7 +7252,7 @@ date_strftime_internal(int argc, VALUE *argv, VALUE self,
  *   Date.new(2001, 2, 3).strftime # => "2001-02-03"
  *
  * For other formats, see
- * {Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html].
+ * {Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc].
  *
  */
 static VALUE
@@ -7284,7 +7284,7 @@ strftimev(const char *fmt, VALUE self,
  *   asctime -> string
  *
  * Equivalent to #strftime with argument <tt>'%a %b %e %T %Y'</tt>
- * (or its {shorthand form}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-Shorthand+Conversion+Specifiers]
+ * (or its {shorthand form}[rdoc-ref:strftime_formatting.rdoc@Shorthand+Conversion+Specifiers]
  * <tt>'%c'</tt>):
  *
  *   Date.new(2001, 2, 3).asctime # => "Sat Feb  3 00:00:00 2001"
@@ -7304,7 +7304,7 @@ d_lite_asctime(VALUE self)
  *   iso8601    ->  string
  *
  * Equivalent to #strftime with argument <tt>'%Y-%m-%d'</tt>
- * (or its {shorthand form}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-Shorthand+Conversion+Specifiers]
+ * (or its {shorthand form}[rdoc-ref:strftime_formatting.rdoc@Shorthand+Conversion+Specifiers]
  * <tt>'%F'</tt>);
  *
  *   Date.new(2001, 2, 3).iso8601 # => "2001-02-03"
@@ -7322,7 +7322,7 @@ d_lite_iso8601(VALUE self)
  *   rfc3339 -> string
  *
  * Equivalent to #strftime with argument <tt>'%FT%T%:z'</tt>;
- * see {Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html]:
+ * see {Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc]:
  *
  *   Date.new(2001, 2, 3).rfc3339 # => "2001-02-03T00:00:00+00:00"
  *
@@ -7338,7 +7338,7 @@ d_lite_rfc3339(VALUE self)
  *   rfc2822 -> string
  *
  * Equivalent to #strftime with argument <tt>'%a, %-d %b %Y %T %z'</tt>;
- * see {Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html]:
+ * see {Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc]:
  *
  *   Date.new(2001, 2, 3).rfc2822 # => "Sat, 3 Feb 2001 00:00:00 +0000"
  *
@@ -7355,7 +7355,7 @@ d_lite_rfc2822(VALUE self)
  *   httpdate -> string
  *
  * Equivalent to #strftime with argument <tt>'%a, %d %b %Y %T GMT'</tt>;
- * see {Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html]:
+ * see {Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc]:
  *
  *   Date.new(2001, 2, 3).httpdate # => "Sat, 03 Feb 2001 00:00:00 GMT"
  *
@@ -9392,7 +9392,7 @@ Init_date_core(void)
      * calendar dates.
      *
      * Consider using
-     * {class Time}[https://docs.ruby-lang.org/en/master/Time.html]
+     * {class Time}[rdoc-ref:Time]
      * instead of class \Date if:
      *
      * - You need both dates and times; \Date handles only dates.
@@ -9444,7 +9444,7 @@ Init_date_core(void)
      *     Date.strptime('fri31dec99', '%a%d%b%y')  # => #<Date: 1999-12-31>
      *
      * See also the specialized methods in
-     * {"Specialized Format Strings" in Formats for Dates and Times}[https://docs.ruby-lang.org/en/master/strftime_formatting_rdoc.html#label-Specialized+Format+Strings]
+     * {"Specialized Format Strings" in Formats for Dates and Times}[rdoc-ref:strftime_formatting.rdoc@Specialized+Format+Strings]
      *
      * == Argument +limit+
      *
diff --git a/lib/csv/table.rb b/lib/csv/table.rb
index 1ce0dd6daf..0b62ae89ae 100644
--- a/lib/csv/table.rb
+++ b/lib/csv/table.rb
@@ -172,7 +172,7 @@ class CSV
     #
     # Raises an exception if the access mode is <tt>:row</tt>
     # and +n+ is not an
-    # {Integer-convertible object}[https://docs.ruby-lang.org/en/master/implicit_conversion_rdoc.html#label-Integer-Convertible+Objects].
+    # {Integer-convertible object}[rdoc-ref:implicit_conversion.rdoc@Integer-Convertible+Objects].
     #   table.by_row! # => #<CSV::Table mode:row row_count:4>
     #   # Raises TypeError (no implicit conversion of String into Integer):
     #   table['Name']
diff --git a/lib/fileutils.rb b/lib/fileutils.rb
index 74bb904e28..745170a121 100644
--- a/lib/fileutils.rb
+++ b/lib/fileutils.rb
@@ -12,8 +12,8 @@ end
 #
 # First, what’s elsewhere. \Module \FileUtils:
 #
-# - Inherits from {class Object}[https://docs.ruby-lang.org/en/master/Object.html].
-# - Supplements {class File}[https://docs.ruby-lang.org/en/master/File.html]
+# - Inherits from {class Object}[rdoc-ref:Object].
+# - Supplements {class File}[rdoc-ref:File]
 #   (but is not included or extended there).
 #
 # Here, module \FileUtils provides methods that are useful for:
@@ -162,8 +162,8 @@ end
 # by applying a special pre-process:
 #
 # - If the target path points to a directory, this method uses methods
-#   {File#chown}[https://docs.ruby-lang.org/en/master/File.html#method-i-chown]
-#   and {File#chmod}[https://docs.ruby-lang.org/en/master/File.html#method-i-chmod]
+#   {File#chown}[rdoc-ref:File#chown]
+#   and {File#chmod}[rdoc-ref:File#chmod]
 #   in removing directories.
 # - The owner of the target directory should be either the current process
 #   or the super user (root).
@@ -291,7 +291,7 @@ module FileUtils
   #
   # With no keyword arguments, creates a directory at each +path+ in +list+
   # by calling: <tt>Dir.mkdir(path, mode)</tt>;
-  # see {Dir.mkdir}[https://docs.ruby-lang.org/en/master/Dir.html#method-c-mkdir]:
+  # see {Dir.mkdir}[rdoc-ref:Dir.mkdir]:
   #
   #   FileUtils.mkdir(%w[tmp0 tmp1]) # => ["tmp0", "tmp1"]
   #   FileUtils.mkdir('tmp4')        # => ["tmp4"]
@@ -299,7 +299,7 @@ module FileUtils
   # Keyword arguments:
   #
   # - <tt>mode: <i>mode</i></tt> - also calls <tt>File.chmod(mode, path)</tt>;
-  #   see {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
+  #   see {File.chmod}[rdoc-ref:File.chmod].
   # - <tt>noop: true</tt> - does not create directories.
   # - <tt>verbose: true</tt> - prints an equivalent command:
   #
@@ -339,7 +339,7 @@ module FileUtils
   # With no keyword arguments, creates a directory at each +path+ in +list+,
   # along with any needed ancestor directories,
   # by calling: <tt>Dir.mkdir(path, mode)</tt>;
-  # see {Dir.mkdir}[https://docs.ruby-lang.org/en/master/Dir.html#method-c-mkdir]:
+  # see {Dir.mkdir}[rdoc-ref:Dir.mkdir]:
   #
   #   FileUtils.mkdir_p(%w[tmp0/tmp1 tmp2/tmp3]) # => ["tmp0/tmp1", "tmp2/tmp3"]
   #   FileUtils.mkdir_p('tmp4/tmp5')             # => ["tmp4/tmp5"]
@@ -347,7 +347,7 @@ module FileUtils
   # Keyword arguments:
   #
   # - <tt>mode: <i>mode</i></tt> - also calls <tt>File.chmod(mode, path)</tt>;
-  #   see {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
+  #   see {File.chmod}[rdoc-ref:File.chmod].
   # - <tt>noop: true</tt> - does not create directories.
   # - <tt>verbose: true</tt> - prints an equivalent command:
   #
@@ -417,7 +417,7 @@ module FileUtils
   #
   # With no keyword arguments, removes the directory at each +path+ in +list+,
   # by calling: <tt>Dir.rmdir(path)</tt>;
-  # see {Dir.rmdir}[https://docs.ruby-lang.org/en/master/Dir.html#method-c-rmdir]:
+  # see {Dir.rmdir}[rdoc-ref:Dir.rmdir]:
   #
   #   FileUtils.rmdir(%w[tmp0/tmp1 tmp2/tmp3]) # => ["tmp0/tmp1", "tmp2/tmp3"]
   #   FileUtils.rmdir('tmp4/tmp5')             # => ["tmp4/tmp5"]
@@ -1044,7 +1044,7 @@ module FileUtils
   module_function :copy_file
 
   # Copies \IO stream +src+ to \IO stream +dest+ via
-  # {IO.copy_stream}[https://docs.ruby-lang.org/en/master/IO.html#method-c-copy_stream].
+  # {IO.copy_stream}[rdoc-ref:IO.copy_stream].
   #
   # Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
   #
@@ -1560,14 +1560,14 @@ module FileUtils
   # Keyword arguments:
   #
   # - <tt>group: <i>group</i></tt> - changes the group if not +nil+,
-  #   using {File.chown}[https://docs.ruby-lang.org/en/master/File.html#method-c-chown].
+  #   using {File.chown}[rdoc-ref:File.chown].
   # - <tt>mode: <i>permissions</i></tt> - changes the permissions.
-  #   using {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
+  #   using {File.chmod}[rdoc-ref:File.chmod].
   # - <tt>noop: true</tt> - does not copy entries; returns +nil+.
   # - <tt>owner: <i>owner</i></tt> - changes the owner if not +nil+,
-  #   using {File.chown}[https://docs.ruby-lang.org/en/master/File.html#method-c-chown].
+  #   using {File.chown}[rdoc-ref:File.chown].
   # - <tt>preserve: true</tt> - preserve timestamps
-  #   using {File.utime}[https://docs.ruby-lang.org/en/master/File.html#method-c-utime].
+  #   using {File.utime}[rdoc-ref:File.utime].
   # - <tt>verbose: true</tt> - prints an equivalent command:
   #
   #     FileUtils.install('src0.txt', 'dest0.txt', noop: true, verbose: true)
@@ -1704,9 +1704,9 @@ module FileUtils
   # returns +list+ if it is an array, <tt>[list]</tt> otherwise:
   #
   # - Modifies each entry that is a regular file using
-  #   {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
+  #   {File.chmod}[rdoc-ref:File.chmod].
   # - Modifies each entry that is a symbolic link using
-  #   {File.lchmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-lchmod].
+  #   {File.lchmod}[rdoc-ref:File.lchmod].
   #
   # Argument +list+ or its elements
   # should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
@@ -1806,9 +1806,9 @@ module FileUtils
   # returns +list+ if it is an array, <tt>[list]</tt> otherwise:
   #
   # - Modifies each entry that is a regular file using
-  #   {File.chown}[https://docs.ruby-lang.org/en/master/File.html#method-c-chown].
+  #   {File.chown}[rdoc-ref:File.chown].
   # - Modifies each entry that is a symbolic link using
-  #   {File.lchown}[https://docs.ruby-lang.org/en/master/File.html#method-c-lchown].
+  #   {File.lchown}[rdoc-ref:File.lchown].
   #
   # Argument +list+ or its elements
   # should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
diff --git a/lib/logger.rb b/lib/logger.rb
index cafebc510a..7e4dacc911 100644
--- a/lib/logger.rb
+++ b/lib/logger.rb
@@ -147,7 +147,7 @@ require_relative 'logger/errors'
 # when the entry is created.
 #
 # The logged timestamp is formatted by method
-# {Time#strftime}[https://docs.ruby-lang.org/en/master/Time.html#method-i-strftime]
+# {Time#strftime}[rdoc-ref:Time#strftime]
 # using this format string:
 #
 #   '%Y-%m-%dT%H:%M:%S.%6N'
@@ -365,7 +365,7 @@ require_relative 'logger/errors'
 # You can set a different format using create-time option
 # +shift_period_suffix+;
 # see details and suggestions at
-# {Time#strftime}[https://docs.ruby-lang.org/en/master/Time.html#method-i-strftime].
+# {Time#strftime}[rdoc-ref:Time#strftime].
 #
 class Logger
   _, name, rev = %w$Id$
@@ -425,7 +425,7 @@ class Logger
   # Argument +datetime_format+ should be either of these:
   #
   # - A string suitable for use as a format for method
-  #   {Time#strftime}[https://docs.ruby-lang.org/en/master/Time.html#method-i-strftime].
+  #   {Time#strftime}[rdoc-ref:Time#strftime].
   # - +nil+: the logger uses <tt>'%Y-%m-%dT%H:%M:%S.%6N'</tt>.
   #
   def datetime_format=(datetime_format)
@@ -453,7 +453,7 @@ class Logger
   # The proc should return a string containing the formatted entry.
   #
   # This custom formatter uses
-  # {String#dump}[https://docs.ruby-lang.org/en/master/String.html#method-i-dump]
+  # {String#dump}[rdoc-ref:String#dump]
   # to escape the message string:
   #
   #   logger = Logger.new($stdout, progname: 'mung')
diff --git a/lib/pstore.rb b/lib/pstore.rb
index 8d7137aa39..99be1d4849 100644
--- a/lib/pstore.rb
+++ b/lib/pstore.rb
@@ -71,7 +71,7 @@ require "digest"
 # when the store is created (see PStore.new).
 # The objects are stored and retrieved using
 # module Marshal, which means that certain objects cannot be added to the store;
-# see {Marshal::dump}[https://docs.ruby-lang.org/en/master/Marshal.html#method-c-dump].
+# see {Marshal::dump}[rdoc-ref:Marshal.dump].
 #
 # == Entries
 #
@@ -79,11 +79,11 @@ require "digest"
 # Each entry has a key and a value, just as in a hash:
 #
 # - Key: as in a hash, the key can be (almost) any object;
-#   see {Hash Keys}[https://docs.ruby-lang.org/en/master/Hash.html#class-Hash-label-Hash+Keys].
+#   see {Hash Keys}[rdoc-ref:Hash@Hash+Keys].
 #   You may find it convenient to keep it simple by using only
 #   symbols or strings as keys.
 # - Value: the value may be any object that can be marshalled by \Marshal
-#   (see {Marshal::dump}[https://docs.ruby-lang.org/en/master/Marshal.html#method-c-dump])
+#   (see {Marshal::dump}[rdoc-ref:Marshal.dump])
 #   and in fact may be a collection
 #   (e.g., an array, a hash, a set, a range, etc).
 #   That collection may in turn contain nested objects,
@@ -194,7 +194,7 @@ require "digest"
 #   end
 #
 # And recall that you can use
-# {dig methods}[https://docs.ruby-lang.org/en/master/dig_methods_rdoc.html]
+# {dig methods}[rdoc-ref:dig_methods.rdoc]
 # in a returned hierarchy of objects.
 #
 # == Working with the Store
diff --git a/lib/set.rb b/lib/set.rb
index 0490654183..df1e68d081 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -66,8 +66,8 @@
 #
 #  First, what's elsewhere. \Class \Set:
 #
-# - Inherits from {class Object}[https://docs.ruby-lang.org/en/master/Object.html#class-Object-label-What-27s+Here].
-# - Includes {module Enumerable}[https://docs.ruby-lang.org/en/master/Enumerable.html#module-Enumerable-label-What-27s+Here],
+# - Inherits from {class Object}[rdoc-ref:Object@What-27s+Here].
+# - Includes {module Enumerable}[rdoc-ref:Enumerable@What-27s+Here],
 #   which provides dozens of additional methods.
 #
 # In particular, class \Set does not have many methods of its own
diff --git a/lib/tempfile.rb b/lib/tempfile.rb
index 8a6bcc3e14..c3263ed3c6 100644
--- a/lib/tempfile.rb
+++ b/lib/tempfile.rb
@@ -104,7 +104,7 @@ class Tempfile < DelegateClass(File)
   # - Directory is the system temporary directory (system-dependent).
   # - Generated filename is unique in that directory.
   # - Permissions are <tt>0600</tt>;
-  #   see {File Permissions}[https://docs.ruby-lang.org/en/master/File.html#label-File+Permissions].
+  #   see {File Permissions}[rdoc-ref:File@File+Permissions].
   # - Mode is <tt>'w+'</tt> (read/write mode, positioned at the end).
   #
   # The underlying file is removed when the \Tempfile object dies
@@ -136,12 +136,12 @@ class Tempfile < DelegateClass(File)
   #   Tempfile.new('foo', '.') # => #<Tempfile:./foo20220505-17839-xfstr8>
   #
   # Keyword arguments +mode+ and +options+ are passed directly to method
-  # {File.open}[https://docs.ruby-lang.org/en/master/File.html#method-c-open]:
+  # {File.open}[rdoc-ref:File.open]:
   #
   # - The value given with +mode+ must be an integer,
   #   and may be expressed as the logical OR of constants defined in
-  #   {File::Constants}[https://docs.ruby-lang.org/en/master/File/Constants.html].
-  # - For +options+, see {Open Options}[https://docs.ruby-lang.org/en/master/IO.html#class-IO-label-Open+Options].
+  #   {File::Constants}[rdoc-ref:File::Constants].
+  # - For +options+, see {Open Options}[rdoc-ref:IO@Open+Options].
   #
   # Related: Tempfile.create.
   #
@@ -344,11 +344,11 @@ end
 #
 # With no block given and no arguments, creates and returns file whose:
 #
-# - Class is {File}[https://docs.ruby-lang.org/en/master/File.html] (not \Tempfile).
+# - Class is {File}[rdoc-ref:File] (not \Tempfile).
 # - Directory is the system temporary directory (system-dependent).
 # - Generated filename is unique in that directory.
 # - Permissions are <tt>0600</tt>;
-#   see {File Permissions}[https://docs.ruby-lang.org/en/master/File.html#label-File+Permissions].
+#   see {File Permissions}[rdoc-ref:File@File+Permissions].
 # - Mode is <tt>'w+'</tt> (read/write mode, positioned at the end).
 #
 # With no block, the file is not removed automatically,
@@ -380,12 +380,12 @@ end
 #   Tempfile.create('foo', '.') # => #<File:./foo20220505-9795-1emu6g8>
 #
 # Keyword arguments +mode+ and +options+ are passed directly to method
-# {File.open}[https://docs.ruby-lang.org/en/master/File.html#method-c-open]:
+# {File.open}[rdoc-ref:File.open]:
 #
 # - The value given with +mode+ must be an integer,
 #   and may be expressed as the logical OR of constants defined in
-#   {File::Constants}[https://docs.ruby-lang.org/en/master/File/Constants.html].
-# - For +options+, see {Open Options}[https://docs.ruby-lang.org/en/master/IO.html#class-IO-label-Open+Options].
+#   {File::Constants}[rdoc-ref:File::Constants].
+# - For +options+, see {Open Options}[rdoc-ref:IO@Open+Options].
 #
 # With a block given, creates the file as above, passes it to the block,
 # and returns the block's value;