[Geany] Options Regex and Escape sequences

[Gregor Geiermann]

Hi Enrico, hi Nick,

thanks for the explanations. I'm still using Geany 0.13, and my local 
version of the manual does not contain the note on \r and \n matching in 
regular expressions - that's why I was a bit lost.

Would be cool to have multi-line support in the future - fingers crossed 
that the Scintilla devs will implement it!

Best regards
Gregor