Explicitly cast Version to str in openfoam-org (#6880)

var/spack/repos/builtin/packages/openfoam-org/package.py

@@ -207,8 +207,8 @@ def patch(self):
         edits = {
             'WM_THIRD_PARTY_DIR':
             r'$WM_PROJECT_DIR/ThirdParty #SPACK: No separate third-party',
-            'WM_VERSION': self.version,    # consistency
-            'FOAMY_HEX_MESH': '',          # This is horrible (unset variable?)
+            'WM_VERSION': str(self.version),  # consistency
+            'FOAMY_HEX_MESH': '',  # This is horrible (unset variable?)
         }
         rewrite_environ_files(  # Adjust etc/bashrc and etc/cshrc
             edits,