Merge pull request #540 from znz/tr_s

Use `tr_s` instead of `tr` and `squeeze`

Author: aycabta

lib/rdoc/any_method.rb

@@ -265,7 +265,7 @@ def param_seq
       params = params.sub(/(\|[^|]+\|)\s*\.\.\.\s*(end|\})/, '\1 \2')
     elsif @params then
       params = @params.gsub(/\s*\#.*/, '')
-      params = params.tr("\n", " ").squeeze(" ")
+      params = params.tr_s("\n ", " ")
       params = "(#{params})" unless params[0] == ?(
     else
       params = ''
@@ -276,7 +276,7 @@ def param_seq
       # &block
       params.sub!(/,?\s*&\w+/, '')
 
-      block = @block_params.tr("\n", " ").squeeze(" ")
+      block = @block_params.tr_s("\n ", " ")
       if block[0] == ?(
         block.sub!(/^\(/, '').sub!(/\)/, '')
       end