python/python-colour: Fix for current.

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

python/python-colour/python-colour.SlackBuild

@@ -85,7 +85,7 @@ sed -i 's,python,python3,g' setup.py
 python3 setup.py install --root=$PKG
 
 # Manually copy colour.py only on Slackware 15.0, where setuptools doesn't install it properly
-if grep -q "Slackware 15.0" /etc/slackware-version ; then
+if grep -Fxq "Slackware 15.0" /etc/slackware-version ; then
   cp colour.py $PKG/usr/lib${LIBDIRSUFFIX}/python3.9/site-packages/
 fi