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-rw-r--r--lib/rdoc/markup/to_html.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/markup/to_html.rb b/lib/rdoc/markup/to_html.rb
index fb38924a04..91cadf9d16 100644
--- a/lib/rdoc/markup/to_html.rb
+++ b/lib/rdoc/markup/to_html.rb
@@ -61,6 +61,7 @@ class RDoc::Markup::ToHtml < RDoc::Markup::Formatter
#
# These methods are used by regexp handling markup added by RDoc::Markup#add_regexp_handling.
+ # :nodoc:
URL_CHARACTERS_REGEXP_STR = /[A-Za-z0-9\-._~:\/\?#\[\]@!$&'\(\)*+,;%=]/.source
##