diff --git a/array.c b/array.c
index 182046856c..9528ea59b6 100644
--- a/array.c
+++ b/array.c
@@ -2442,14 +2442,14 @@ sort_2(const void *ap, const void *bp, void *dummy)
  *  an integer less than 0 when +b+ follows +a+, +0+ when +a+ and +b+
  *  are equivalent, or an integer greater than 0 when +a+ follows +b+.
  *
- *  The result is not guaranteed as stable.  When comparison of two
+ *  The result is not guaranteed to be stable.  When the comparison of two
  *  elements returns +0+, the order of the elements is unpredictable.
  *
- *  See also Enumerable#sort_by.
- *
  *     a = [ "d", "a", "e", "c", "b" ]
  *     a.sort!                    #=> ["a", "b", "c", "d", "e"]
  *     a.sort! { |x,y| y <=> x }  #=> ["e", "d", "c", "b", "a"]
+ *
+ *  See also Enumerable#sort_by.
  */
 
 VALUE
@@ -2526,14 +2526,14 @@ rb_ary_sort_bang(VALUE ary)
  *  an integer less than 0 when +b+ follows +a+, +0+ when +a+ and +b+
  *  are equivalent, or an integer greater than 0 when +a+ follows +b+.
  *
- *  The result is not guaranteed as stable.  When comparison of two
+ *  The result is not guaranteed to be stable.  When the comparison of two
  *  elements returns +0+, the order of the elements is unpredictable.
  *
- *  See also Enumerable#sort_by.
- *
  *     a = [ "d", "a", "e", "c", "b" ]
  *     a.sort                    #=> ["a", "b", "c", "d", "e"]
  *     a.sort { |x,y| y <=> x }  #=> ["e", "d", "c", "b", "a"]
+ *
+ *  See also Enumerable#sort_by.
  */
 
 VALUE
@@ -2685,11 +2685,12 @@ sort_by_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, dummy))
  *  Sorts +self+ in place using a set of keys generated by mapping the
  *  values in +self+ through the given block.
  *
- *  The result is not guaranteed as stable.  When two keys are equal,
+ *  The result is not guaranteed to be stable.  When two keys are equal,
  *  the order of the corresponding elements is unpredictable.
  *
  *  If no block is given, an Enumerator is returned instead.
  *
+ *  See also Enumerable#sort_by.
  */
 
 static VALUE
diff --git a/enum.c b/enum.c
index 3e79a35cb5..0c35efc6e5 100644
--- a/enum.c
+++ b/enum.c
@@ -935,7 +935,7 @@ enum_first(int argc, VALUE *argv, VALUE obj)
  *  an integer less than 0 when +b+ follows +a+, +0+ when +a+ and +b+
  *  are equivalent, or an integer greater than 0 when +a+ follows +b+.
  *
- *  The result is not guaranteed as stable.  When comparison of two
+ *  The result is not guaranteed to be stable.  When the comparison of two
  *  elements returns +0+, the order of the elements is unpredictable.
  *
  *     %w(rhea kea flea).sort           #=> ["flea", "kea", "rhea"]
@@ -1011,7 +1011,7 @@ sort_by_cmp(const void *ap, const void *bp, void *data)
  *  Sorts <i>enum</i> using a set of keys generated by mapping the
  *  values in <i>enum</i> through the given block.
  *
- *  The result is not guaranteed as stable.  When two keys are equal,
+ *  The result is not guaranteed to be stable.  When two keys are equal,
  *  the order of the corresponding elements is unpredictable.
  *
  *  If no block is given, an enumerator is returned instead.