laravel/framework — pull request #3837 by CurosMJ (2014-03-09 00:24:44+00:00)
Title: updated the regex of 'alpha*' validation rules

Regex for alphabets was '/^\pL+$/u', which would match almost all 'letters'.
There are some languages in which a 'modifier' is also applicable to the letter,
adding another '/pM' takes care of this.