Strip color codes from notifications

[sprusr]

Fixes erming/shout#628

[dgw]

This should probably strip all control codes, not just colors.

• \x02: bold text
• \x03: colored text (already handled with arguments, :+1:)
• \x1D: italic text
• \x1F: underlined text
• \x16: swap background and foreground colors ("reverse video")
• \x0F: reset all formatting

[sprusr]

Hey @dgw thanks for the suggestion. Initially I thought it wouldn't be necessary to handle these, as they represent characters that won't be displayed, but I suppose it depends on the situation. Will make the changes suggested, thanks again.

[dgw]

If only worrying about characters that are displayed, there's no reason to remove \x03 from colors; just removing the digits would suffice. :wink:

Thanks for updating the PR. I figured (and should have explained initially) that it's best to remove all of the control codes in case of misbehaving fonts, or other weirdness that could arise from having non-printing characters in the notifications. There are a lot of system configurations out there, and as long as we're stripping one kind of control character…

:100::+1:

[xPaw]

:+1: However, this probably conflicts #627 as that PR moves code around.

[sprusr]

My apologies for the number of commits this is taking for a single regex! I haven't made much contribution to open source projects before, so thank you for being so helpful along the way.

[AlMcKinlay]

Don't worry about that, @sprusr, we all have to start somewhere :-)

The only thing is that before this gets merged, it'll be good to squash the commits into 1.