Replace black with ruff formatter

#236 (comment)

Author: ulgens

.pre-commit-config.yaml

@@ -8,16 +8,12 @@ repos:
     - id: django-upgrade
       args: [--target-version, "5.2"]
 
-  - repo: https://github.com/ambv/black
-    rev: 25.12.0
-    hooks:
-      - id: black
-
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.14.9
     hooks:
       - id: ruff-check
         args: ["--fix"]
+      - id: ruff-format
 
   - repo: https://github.com/asottile/pyupgrade
     rev: v3.21.2

cbv/models.py

@@ -306,7 +306,9 @@ def basic_yuml_data(self, first: bool = False) -> list[str]:
                     child_col=(
                         "green"
                         if first
-                        else "white" if self.is_secondary() else "lightblue"
+                        else "white"
+                        if self.is_secondary()
+                        else "lightblue"
                     ),
                 )
             )