Adding upstream version 4.5.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/fix_byte_order_marker_test.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from pre_commit_hooks import fix_byte_order_marker
+
+
+def test_failure(tmpdir):
+    f = tmpdir.join('f.txt')
+    f.write_text('ohai', encoding='utf-8-sig')
+    assert fix_byte_order_marker.main((str(f),)) == 1
+
+
+def test_success(tmpdir):
+    f = tmpdir.join('f.txt')
+    f.write_text('ohai', encoding='utf-8')
+    assert fix_byte_order_marker.main((str(f),)) == 0