TAP colors

[Daniel Herring]

Hi,

Regarding the topic of colored TAP output, it seems that there are good
reasons for having both plain-text and colored-text output. There are
also reasons for people to customize the colors.

Here are two ideas that might help. For all I know, the code may already
be structured this way, and we just have a small documentation issue to
improve awareness of the features.

1) Would it be hard to support both, perhaps with separate targets like
tap and tap-color? Then people can easily select plain and colored text
according to preference or present need.

2) Would it be possible to split out the color escape sequences into
Autoconf site configuration variables? Named according to semantics, not
the actual color, something like TAP_COLOR_PRE_WARN and
TAP_COLOR_POST_WARN. Then you could provide configurations for dark ANSI
background, light ANSI background, and people with non-ANSI terminals
could do whatever their terminal requires.

Implementing #2 might also simplify #1. Plain text has empty escape
sequences...

Later,
Daniel