take into account optional leading whitespace in module-version statement in Tcl syntax in ModulesTool.module_wrapper_exists method

Author: boegel

easybuild/tools/modules.py

@@ -464,7 +464,7 @@ def module_wrapper_exists(self, mod_name, modulerc_fn='.modulerc', mod_wrapper_r
         Only .modulerc file in Tcl syntax is considered here.
         """
         if mod_wrapper_regex_template is None:
-            mod_wrapper_regex_template = "^module-version (?P<wrapped_mod>[^ ]*) %s$"
+            mod_wrapper_regex_template = "^[ ]*module-version (?P<wrapped_mod>[^ ]*) %s$"
 
         wrapped_mod = None