Merge pull request #1683 from pre-commit/textwrap_indent

use textwrap.indent instead of _indent

pre_commit/commands/migrate_config.py

@@ -1,4 +1,5 @@
 import re
+import textwrap
 
 import yaml
 
@@ -6,11 +7,6 @@ from pre_commit.clientlib import load_config
 from pre_commit.util import yaml_load
 
 
-def _indent(s: str) -> str:
-    lines = s.splitlines(True)
-    return ''.join(' ' * 4 + line if line.strip() else line for line in lines)
-
-
 def _is_header_line(line: str) -> bool:
     return line.startswith(('#', '---')) or not line.strip()
 
@@ -34,7 +30,7 @@ def _migrate_map(contents: str) -> str:
             yaml_load(trial_contents)
             contents = trial_contents
         except yaml.YAMLError:
-            contents = f'{header}repos:\n{_indent(rest)}'
+            contents = f'{header}repos:\n{textwrap.indent(rest, " " * 4)}'
 
     return contents