Add a reset to remove bold when not asked

[utix]

Some part are bold even if not configure to be

func on this example:

Reseting ascii at the begining fixes it

[scottchiefbaker]

Is the only place this is affecting the "last function" fragment? If so, it probably makes more sense to JUST reset that one, instead of EVERYTHING in git_ansi_color()?

[utix]

Hard to check all combination, should I check on master or next branch ?
For info bright, seems broken on next branch, since 754f9df with git bisec
for example birghtyellow is not working on func

[utix]

Ok I get it, https://github.com/so-fancy/diff-so-fancy/blob/master/diff-so-fancy#L303 bold seems forced here

[scottchiefbaker]

This looks innocent enough, and seems like a good solution.