Fix Regex Pattern
Here is a test for this pattern:
var value= 'pages_3456'
,pattern = /_(\d+)$/
,result = value.toString().match(pattern);
it only works if the pattern is `/_(\d+)$/` if it has the additional `\` it dose not remove the table name.
This issue was automatically created from https://github.com/TYPO3/TYPO3.CMS/pull/157