Substitute environment variables already in setter of cq_description_…

…template

src/mlx/regex_checker.py

@@ -1,5 +1,4 @@
 import hashlib
-import os
 import re
 from pathlib import Path
 
@@ -62,7 +61,7 @@ def add_code_quality_finding(self, match):
         groups = {name: result for name, result in match.groupdict().items() if result}
         for name, result in groups.items():
             if name.startswith("description"):
-                finding["description"] = self.cq_description_template.substitute(os.environ, description=result)
+                finding["description"] = self.cq_description_template.substitute(description=result)
                 break
         else:
             return  # no description was found, which is the bare minimum

src/mlx/warnings_checker.py

@@ -39,7 +39,7 @@ def cq_description_template(self):
     @cq_description_template.setter
     def cq_description_template(self, template_obj):
         try:
-            template_obj.substitute(os.environ, description='test')
+            template_obj.template = template_obj.substitute(os.environ, description='$description')
         except KeyError as err:
             raise ValueError(f"Failed to find environment variable from configuration value "
                              f"'cq_description_template': {err}") from err