Fix postprocessing escaping (#1907)

bazarr/utilities/post_processing.py

@@ -5,9 +5,9 @@ import re
 
 # Wraps the input string within quotes & escapes the string
 def _escape(in_str):
-    raw_map = {8:r'\b', 7:r'\a', 12:r'\f', 10:r'\n', 13:r'\r', 9:r'\t', 11:r'\v', 39:'\\\'', 34:'"', 92:'\\'}
+    raw_map = {8:r'\\b', 7:r'\\a', 12:r'\\f', 10:r'\\n', 13:r'\\r', 9:r'\\t', 11:r'\\v', 34:r'\"', 92:r'\\'}
     raw_str = r''.join(raw_map.get(ord(i), i) for i in in_str)
-    return f"'{raw_str}'"
+    return f"\"{raw_str}\""
 
 def pp_replace(pp_command, episode, subtitles, language, language_code2, language_code3, episode_language, episode_language_code2, episode_language_code3, forced, score, subtitle_id, provider, series_id, episode_id, hi):
     pp_command = re.sub(r'[\'"]?{{directory}}[\'"]?', _escape(os.path.dirname(episode)), pp_command)