Add format checks

Author: RalfG

.github/workflows/test.yml

@@ -18,10 +18,15 @@ jobs:
         with:
           python-version: "3.10"
 
-      - name: Check with Ruff
+      - name: Lint with Ruff
         uses: astral-sh/ruff-action@v3
         with:
-          args: --exclude docs,tests
+          args: format --check --diff --exclude docs,tests
+
+      - name: Check formatting with Ruff
+        uses: astral-sh/ruff-action@v3
+        with:
+          args: --check exclude docs,tests
 
       - name: Install package and its dependencies
         run: pip install --editable .[dev,idxml]

psm_utils/io/peptide_record.py

@@ -188,8 +188,7 @@ def _entry_to_psm(entry: _PeprecEntry, filename: str | Path) -> PSM:
                 is_decoy = is_decoy_map[entry.label]
             except (ValueError, KeyError) as e:
                 raise InvalidPeprecError(
-                    f"Could not parse value for `label` {entry.label}. "
-                    "Should be `1` or `-1`."
+                    f"Could not parse value for `label` {entry.label}. Should be `1` or `-1`."
                 ) from e
         else:
             is_decoy = None