Watched word regular expression crash

[nbianca (Bianca)]

@RGJ

First, an error in a regular expression causes a 500 server error when any post is made.

This has been fixed:

@RGJ

Second, a previously correct regular expression which escapes a dash, is now seen as incorrect. So where \- used to work prior to 3.1.0 stable, it now causes a fatal error.

I am currently looking into finding a way to enable the validation of JS regular expressions from the Ruby side. I hope to have a fix ready soon.