ci: enable pyupgrade rules in ruff (#921)

pyproject.toml

@@ -68,6 +68,7 @@ extend-select = [
   "B", # flake8-bugbear
   "C4", # flake8-comprehensions
   "I", # isort
+  "UP", # pyupgrade
 ]
 
 [build-system]

src/syrupy/extensions/amber/__init__.py

@@ -53,7 +53,7 @@ def _read_snapshot_collection(self, snapshot_location: str) -> "SnapshotCollecti
         return self.serializer_class.read_file(snapshot_location)
 
     @classmethod
-    @lru_cache()
+    @lru_cache
     def __cacheable_read_snapshot(
         cls, snapshot_location: str, cache_key: str
     ) -> "SnapshotCollection":

src/syrupy/extensions/amber/serializer.py

@@ -139,7 +139,7 @@ def __read_file_with_markers(
         missing_version = True
 
         try:
-            with open(filepath, "r", encoding=TEXT_ENCODING, newline=None) as f:
+            with open(filepath, encoding=TEXT_ENCODING, newline=None) as f:
                 for line_no, line in enumerate(f):
                     if line.startswith(cls._marker_prefix):
                         marker_key, *marker_rest = line[marker_offset:].split(

src/syrupy/report.py

@@ -359,8 +359,9 @@ def lines(self) -> Iterator[str]:
                         path_to_file = filepath
 
                     unused_snapshots = ", ".join(map(bold, sorted(snapshots)))
-                    yield warning_style(gettext(base_message)) + " {} ({})".format(
-                        unused_snapshots, path_to_file
+                    yield (
+                        warning_style(gettext(base_message))
+                        + f" {unused_snapshots} ({path_to_file})"
                     )
             if not self.update_snapshots:
                 message = gettext(