Commit 1bf481da6914b7201e27d5c92262a76461311740

"true" in .gitconfig also means true, in addition to "yes".
  
126126want_color = `git config color.wtf`
127127want_color = `git config color.ui` if want_color.empty?
128128$color = case want_color.chomp
129 when "true"; true
129130 when "yes"; true
130131 when "auto"; $stdout.tty?
131132end