strip `'` and `"` from config

[yannick]

trafficstars

note sure if a bug, but took some trial and error to figure it out what was wrong:

when converting from command line to the config file i noticed that the parser fails if e.g. the color is surrounded by quotes. --border-color='#03E7B055' -> border-color='#03E7B055'

(also white spaces at the end of the line cause a fail)

[emersion]

Hmm, I'm not a fan of doing this.

(also white spaces at the end of the line cause a fail)

What do you mean by "fail"? Will it print an error and refuse to load the config file?

[yannick]

whitespaces: it refuses to load with: [config:1] Failed to parse option 'text-color' which i guess is a quite confusing message.

[emersion]

Stripping end-of-line whitespace seems sensible as we're trimming whitespace around = anyway.

Error messages could be improved by printing the whole line.

[vilhalmer]

Update: #177 hopefully improved this situation, but I'll leave this open until we do something about the whitespace.