obslog: colorize the description diff shown in obslog -p
This patch colorizes the description diff shown in `hg obslog -p`. The labels
for the header are different from that of the patch as the main header which
says `diff -r <somehash> -r <somehash> <filename>`. Next patch will hack to add
that.
#!/bin/sh
sleep 5
echo "new desc" >> $1