Modified pre-commit hook for executable file checking.

Changed to allow a space between the hash-bang and the slash.
refs #7284

.githooks/pre-commit

@@ -121,7 +121,7 @@ mode_looks_exe() {
 		*.exe) return 0 ;;
 		*.com) return 0 ;;
 	esac
-	git cat-file blob "$2" | head -1 | grep "^#\!/" > /dev/null
+	git cat-file blob "$2" | head -1 | grep "^#\!\s*/" > /dev/null
 }
 mode_not_exe () {
 	echo "The file '$file' has looks executable but does not have an executable mode."