Make TextTransform handle Regex Special Characters

[RichiCoder1]

If I were to set the delimiters for TextTransform to $, it will break, as $ is a regex special character. TextTransform should handle this.

[devlead]

Wondering if it's just about escaping . $ ^ { [ ( | ) * + ? \ in the inputed key data?

[patriksvensson]

Yes, that will probably work. We could always make sure that we escape the data for the user, but as a work around this should work.

[devlead]

@patriksvensson i agree think we should fix it in the code, basically when key added to expression we should escape like we do with quoting etc. in other areas.