Fixed errors in makerst pre-commit hook

(cherry picked from commit 619354fb2c)

misc/hooks/pre-commit-makerst

@@ -2,4 +2,11 @@
 
 # Git pre-commit hook that checks the class reference syntax using makerst.py.
 
-doc/tools/makerst.py doc/classes modules --dry-run
+# Workaround because we can't execute the .py file directly on windows
+PYTHON=python
+py_ver=$($PYTHON -c "import sys; print(sys.version_info.major)")
+if [[ "$py_ver" != "3" ]]; then
+  PYTHON+=3
+fi
+
+$PYTHON doc/tools/makerst.py doc/classes modules --dry-run