Fix test_get_filelines to use binary mode on Windows

Reverted get_filelines change that was breaking formatter comparisons.
Fixed test to write files in binary mode to avoid Windows text mode
converting \n to \r\n, which caused test failures.

Author: pocc

hooks/utils.py

@@ -205,6 +205,4 @@ def get_filelines(self, filename: str):
             self.raise_error(f"File {filename} not found", "Check your path to the file.")
         with open(filename, "rb") as f:
             filetext = f.read()
-        # Remove Windows carriage returns before splitting
-        filetext = filetext.replace(b"\r", b"")
         return filetext.split(b"\x0a")

tests/test_utils_functions.py

@@ -338,8 +338,9 @@ def __init__(self):
 
     def test_get_filelines_reads_file(self):
         """Test that get_filelines correctly reads file contents."""
-        with tempfile.NamedTemporaryFile(mode="w", suffix=".c", delete=False) as f:
-            f.write("line1\nline2\nline3\n")
+        # Use binary mode to avoid Windows text mode \n to \r\n conversion
+        with tempfile.NamedTemporaryFile(mode="wb", suffix=".c", delete=False) as f:
+            f.write(b"line1\nline2\nline3\n")
             temp_file = f.name
 
         try: