[DOC] Fix indent [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61406 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

file.c

@@ -2128,7 +2128,7 @@ rb_file_s_atime(VALUE klass, VALUE fname)
  *     file.atime    -> time
  *
  *  Returns the last access time (a <code>Time</code> object)
- *   for <i>file</i>, or epoch if <i>file</i> has not been accessed.
+ *  for <i>file</i>, or epoch if <i>file</i> has not been accessed.
  *
  *     File.new("testfile").atime   #=> Wed Dec 31 18:00:00 CST 1969
  *