Add simple automated translation formatting checks

To keep all translation same formatting standard.

example,

Correct: You must <em>either</em> upload a file or enter a URL.
Wrong: You must<em>either</em>upload a file or enter a URL.
suggest: add space before <em> tag.

Correct: You can <a href=\"@block-admin\">configure blocks</a> to be displayed
Wrong: You can<a href=\"@block-admin\"> configure blocks</a> to be displayed
suggest:add space before "<a" and no space between "> confgure"

this modules doing similar function:
http://drupal.org/project/atr