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