fix: wrong use of formatting code

Author: hgrecco

pint/facets/plain/registry.py

@@ -662,7 +662,7 @@ def get_name(self, name_or_alias: str, case_sensitive: bool | None = None) -> st
         prefix, unit_name, _ = candidates[0]
         if len(candidates) > 1:
             logger.warning(
-                f"Parsing {name_or_alias} yield multiple results. Options are: {candidates:!r}"
+                f"Parsing {name_or_alias} yield multiple results. Options are: {candidates!r}"
             )
 
         if prefix:
@@ -689,7 +689,7 @@ def get_symbol(self, name_or_alias: str, case_sensitive: bool | None = None) ->
         prefix, unit_name, _ = candidates[0]
         if len(candidates) > 1:
             logger.warning(
-                f"Parsing {name_or_alias} yield multiple results. Options are: {candidates:!r}"
+                f"Parsing {name_or_alias} yield multiple results. Options are: {candidates!r}"
             )
 
         return self._prefixes[prefix].symbol + self._units[unit_name].symbol