doctrine/common — pull request #225 by fruit (2012-11-20 23:44:03+00:00)
Title: Replace file_exists() calls with is_file() where it is needed

The function `file_exists()` checks whether file or directory exists. And `is_file()` checks only files for the existence. All places, where `file_exists()` is replaced with `is_file()` needs only to check for file existence.