Escape method names in HTML

The following is invalid HTML: <a href="Array.html#method-i-3C-3C"><code><<</code></a></p> Incorrect: <code><<</code> Correct: <code>&lt;&lt;</code> Fixes #761

Author: natematykiewicz

lib/rdoc/markup/to_html_crossref.rb

@@ -144,7 +144,7 @@ def link name, text, code = true
  path = ref.as_href @from_path
 
  if code and RDoc::CodeObject === ref and !(RDoc::TopLevel === ref)
- text = "<code>#{text}</code>"
+ text = "<code>#{CGI.escapeHTML text}</code>"
  end
 
  if path =~ /#/ then

test/rdoc/test_rdoc_markup_to_html_crossref.rb

@@ -89,6 +89,20 @@ def test_convert_RDOCLINK_rdoc_ref_method_percent
  assert_equal para("<a href=\"C1.html#method-c-25\"><code>C1::%</code></a>"), result
  end
 
+ def test_convert_RDOCLINK_rdoc_ref_method_escape_html
+ m = @c1.add_method RDoc::AnyMethod.new nil, '<<'
+ m.singleton = false
+
+ result = @to.convert 'rdoc-ref:C1#<<'
+
+ assert_equal para("<a href=\"C1.html#method-i-3C-3C\"><code>C1#&lt;&lt;</code></a>"), result
+ m.singleton = true
+
+ result = @to.convert 'rdoc-ref:C1::<<'
+
+ assert_equal para("<a href=\"C1.html#method-c-3C-3C\"><code>C1::&lt;&lt;</code></a>"), result
+ end
+
  def test_convert_RDOCLINK_rdoc_ref_method_percent_label
  m = @c1.add_method RDoc::AnyMethod.new nil, '%'
  m.singleton = false