Add a pre-commit hook to check the class reference syntax

This also makes documentation helper scripts executable.

doc/tools/doc_merge.py

@@ -1,6 +1,6 @@
 # Git hooks for Godot Engine
 
-This folder contains git hooks meant to be installed locally by Godot Engine
+This folder contains Git hooks meant to be installed locally by Godot Engine
 contributors to make sure they comply with our requirements.
 
 ## List of hooks
@@ -9,10 +9,12 @@ contributors to make sure they comply with our requirements.
   before accepting a commit; blocks the commit and generates a patch if the
   style is not respected.
   Should work on Linux and macOS. You may need to edit the file if your
-  clang-format binary is not in the $PATH, or if you want to enable colored
+  clang-format binary is not in the `$PATH`, or if you want to enable colored
   output with pygmentize.
+- Pre-commit hook for makerst: Checks the class reference syntax using `makerst.py`.
+  Should work on Linux and macOS.
 
 ## Installation
 
-Copy all the files from this folder into your .git/hooks folder, and make sure
+Copy all the files from this folder into your `.git/hooks` folder, and make sure
 the hooks and helper scripts are executable.

misc/hooks/pre-commit

@@ -14,7 +14,7 @@
 # as this script. Hooks should return 0 if successful and nonzero to cancel the
 # commit. They are executed in the order in which they are listed.
 #HOOKS="pre-commit-compile pre-commit-uncrustify"
-HOOKS="pre-commit-clang-format"
+HOOKS="pre-commit-clang-format pre-commit-makerst"
 ###########################################################
 # There should be no need to change anything below this line.
 

misc/hooks/pre-commit-makerst

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+# Git pre-commit hook that checks the class reference syntax using makerst.py.
+
+doc/tools/makerst.py doc/classes modules --dry-run