Cannot create link to unary operator methods

[UlyssesZh]

##
class RDocTest
  ##
  # I want to refer to #-@ the unary operator method.
  def -@
  end
end

Generate the doc using rdoc, and the hyperlink to #-@ method is not created.

[hyrious]

Quickly looked into the source code and here comes my fix:

1. add +@, -@ regex to

   rdoc/lib/rdoc/cross_reference.rb

   Line 22 in 78f3ce4

   METHOD_REGEXP_STR = '([a-z]\w*[!?=]?|%|===|\[\]=?|<<|>>|-|\+|\*)(?:\([\w.+*/=<>-]*\))?'

   -  METHOD_REGEXP_STR = '([a-z]\w*[!?=]?|%|===|\[\]=?|<<|>>|-|\+|\*)(?:\([\w.+*/=<>-]*\))?'
   +  METHOD_REGEXP_STR = '([a-z]\w*[!?=]?|%|===|\[\]=?|<<|>>|\+@|-@|-|\+|\*)(?:\([\w.+*/=<>-]*\))?'

2. exclude them from

   rdoc/lib/rdoc/markup/to_html_crossref.rb

   Line 65 in 78f3ce4

   if name =~ /(.*[^#:])@/

   rdoc/lib/rdoc/markup/to_html_crossref.rb

   Line 141 in 78f3ce4

   if name =~ /(.*[^#:])@/ then

   -    if name =~ /(.*[^#:])@/
   +    if !(name.end_with?('+@', '-@')) and name =~ /(.*[^#:])@/

It just works. Not sure if it has further bugs.

[aycabta]

@UlyssesZh Thank you for this reporting. I found some broken links to unary operator methods in Ruby's official documents. This will help for users so much.

@hyrious It's a great patch. I created #778 with a commit you're the author of.

[aycabta]

@hyrious Congrats! This is your first commit in Ruby repository!