Quote variable to prevent globbing, word splitting in .git_hooks_pre-commit

.git_hooks_pre-commit

@@ -2,10 +2,10 @@
 
 set -e
 
-HOOKS=$(dirname $0)
-GIT=$(dirname $HOOKS)
-ROOT=$(dirname $GIT)
+HOOKS=$(dirname "$0")
+GIT=$(dirname "$HOOKS")
+ROOT=$(dirname "$GIT")
 
-. $ROOT/env/bin/activate
-$ROOT/script/lint
-$ROOT/script/coverage
+. "$ROOT/env/bin/activate"
+"$ROOT/script/lint"
+"$ROOT/script/coverage"