Tumbleweed grep --colors=auto (unreadable filenames, purple on black) - easy fix

All,

   Currently Tumbleweed grep --color=auto outputs filename color as 
dark-purple on black (Linux colors). All of grep colors can be set with 
the environment variable GREP_COLORS and the list is given in man grep 
under GREP_COLORS surprising enough.

   You can use 256 terminal colors if your terminal supports them. To 
change the dark-purple to a readable light-purple (both on white or 
black backgrounds), simply add the following export to your .bashrc, e.g.

## grep auto colors
export GREP_COLORS='fn=38;5;13'

   The 38;5; is just the 256 foreground prefix and the 13 is the color. 
Background prefix is 48;5;

   Hopefully this helps someone else -- and make it easier to find 2 
years from know when I've forgotten :)

-- 
David C. Rankin, J.D.,P.E.