Convert formatting to use ruff instead of yapf + isort (#26247)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

tools/check_triton_import.py

@@ -23,8 +23,7 @@ def is_allowed_file(current_file: str) -> bool:
 
 def is_forbidden_import(line: str) -> bool:
     stripped = line.strip()
-    return bool(
-        FORBIDDEN_IMPORT_RE.match(stripped)) and stripped not in ALLOWED_LINES
+    return bool(FORBIDDEN_IMPORT_RE.match(stripped)) and stripped not in ALLOWED_LINES
 
 
 def parse_diff(diff: str) -> list[str]:
@@ -42,24 +41,24 @@ def parse_diff(diff: str) -> list[str]:
         elif line.startswith("@@"):
             match = re.search(r"\+(\d+)", line)
             if match:
-                current_lineno = int(
-                    match.group(1)) - 1  # next "+ line" is here
+                current_lineno = int(match.group(1)) - 1  # next "+ line" is here
         elif line.startswith("+") and not line.startswith("++"):
             current_lineno += 1
             code_line = line[1:]
             if is_forbidden_import(code_line):
                 violations.append(
-                    f"{current_file}:{current_lineno}: {code_line.strip()}")
+                    f"{current_file}:{current_lineno}: {code_line.strip()}"
+                )
     return violations
 
 
 def get_diff(diff_type: str) -> str:
     if diff_type == "staged":
         return subprocess.check_output(
-            ["git", "diff", "--cached", "--unified=0"], text=True)
+            ["git", "diff", "--cached", "--unified=0"], text=True
+        )
     elif diff_type == "unstaged":
-        return subprocess.check_output(["git", "diff", "--unified=0"],
-                                       text=True)
+        return subprocess.check_output(["git", "diff", "--unified=0"], text=True)
     else:
         raise ValueError(f"Unknown diff_type: {diff_type}")
 
@@ -75,8 +74,10 @@ def main():
             print(f"[{diff_type}] Git diff failed: {e}", file=sys.stderr)
 
     if all_violations:
-        print("❌ Forbidden direct `import triton` detected."
-              " ➤ Use `from vllm.triton_utils import triton` instead.\n")
+        print(
+            "❌ Forbidden direct `import triton` detected."
+            " ➤ Use `from vllm.triton_utils import triton` instead.\n"
+        )
         for v in all_violations:
             print(f"❌ {v}")
         return 1