* lib/rdoc.rb: Updated to RDoc 3.6

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31558 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/text.rb

@@ -61,25 +61,17 @@ module RDoc::Text
   # Flush +text+ left based on the shortest line
 
   def flush_left text
-    indents = []
+    indent = 9999
 
     text.each_line do |line|
-      indents << (line =~ /[^\s]/ || 9999)
+      line_indent = line =~ /\S/ || 9999
+      indent = line_indent if indent > line_indent
     end
 
-    indent = indents.min
-
-    flush = []
-
     empty = ''
     empty.force_encoding text.encoding if Object.const_defined? :Encoding
 
-    text.each_line do |line|
-      line[/^ {0,#{indent}}/] = empty
-      flush << line
-    end
-
-    flush.join
+    text.gsub(/^ {0,#{indent}}/, empty)
   end
 
   ##