Protect against branches named "." in generate-stackbrew-library.sh

Author: tianon

generate-stackbrew-library.sh

@@ -7,7 +7,7 @@ url='git://github.com/docker-library/wordpress'
 
 echo '# maintainer: InfoSiftr <[email protected]> (@infosiftr)'
 
-commit="$(git log -1 --format='format:%H' .)"
+commit="$(git log -1 --format='format:%H' -- .)"
 fullVersion="$(grep -m1 'ENV WORDPRESS_VERSION ' Dockerfile | cut -d' ' -f3)"
 
 versionAliases=()