documentation by @phiggins [GH fixes #263]

* file.c: Alias File #path and #to_path.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40016 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

file.c

@@ -264,6 +264,7 @@ apply2files(void (*func)(const char *, VALUE, void *), VALUE vargs, void *arg)
 /*
  *  call-seq:
  *     file.path  ->  filename
+ *     file.to_path  ->  filename
  *
  *  Returns the pathname used to create <i>file</i> as a string. Does
  *  not normalize the name.