Fix f-string usage

Makefile

@@ -46,7 +46,7 @@ $(DEPENDENCIES): poetry.lock
 	@ touch $@
 
 poetry.lock: pyproject.toml
-	poetry lock
+	poetry lock --no-update
 	@ touch $@
 
 .cache:

datafiles/converters/__init__.py

@@ -59,7 +59,7 @@ def map_type(cls, *, name: str = '', item_cls: Optional[type] = None):
             try:
                 converter = map_type(item_cls or cls.__args__[0])
             except TypeError as e:
-                assert '~T' in str(e), f'Unhandled error: ' + str(e)
+                assert '~T' in str(e), f'Unhandled error: {e}'
                 raise TypeError("Type is required with 'List' annotation") from None
             else:
                 converter = List.of_type(converter)
@@ -74,7 +74,7 @@ def map_type(cls, *, name: str = '', item_cls: Optional[type] = None):
                     key = map_type(cls.__args__[0])
                     value = map_type(cls.__args__[1])
                 except TypeError as e:
-                    assert '~' in str(e), f'Unhandled error: ' + str(e)
+                    assert '~' in str(e), f'Unhandled error: {e}'
                     raise TypeError(
                         "Types are required with 'Dict' annotation"
                     ) from None

datafiles/mapper.py

@@ -264,7 +264,7 @@ def save(self, *, include_default_values: Trilean = None, _log=True) -> None:
             if _log:
                 log.info(f"Saving '{self.classname}' object to '{self.relpath}'")
         else:
-            raise RuntimeError(f"'pattern' must be set to save the model")
+            raise RuntimeError("'pattern' must be set to save the model")
 
         with hooks.disabled():
             text = self._get_text(include_default_values=include_default_values)