[IMP] add information in error message

Not always clear what was the issue with only the keyword

pelican/contents.py

@@ -358,8 +358,9 @@ class Content:
             origin = joiner(siteurl, Author(path, self.settings).url)
         else:
             logger.warning(
-                "Replacement Indicator '%s' not recognized, skipping replacement",
+                "Replacement Indicator %r not recognized in %r, skipping replacement",
                 what,
+                origin,
             )
 
         # keep all other parts, such as query, fragment, etc.

pelican/tests/test_contents.py

@@ -1036,7 +1036,7 @@ class TestStatic(LoggedTestCase):
         self.assertEqual(content, html)
         self.assertLogCountEqual(
             count=1,
-            msg="Replacement Indicator 'unknown' not recognized, "
+            msg="Replacement Indicator 'unknown' not recognized in '{unknown}foo', "
             "skipping replacement",
             level=logging.WARNING,
         )