Pathvalidate (#1408)

* Update requirements.txt

Adding `pathvalidate` to requrements

* Update __init__.py

Adding `pathvalidate` to make  correct filename on other then ascii encodings.

* Updating with sanitize_filename

* Removing unused variable.

src/gam/__init__.py

@@ -33,6 +33,7 @@ import http.client as http_client
 from multiprocessing import Pool as mp_pool
 from multiprocessing import Lock as mp_lock
 from urllib.parse import quote, urlencode, urlparse
+from pathvalidate import sanitize_filename
 import dateutil.parser
 
 import googleapiclient
@@ -4064,8 +4065,7 @@ def downloadDriveFile(users):
                     if targetName:
                         safe_file_title = targetName
                     else:
-                        safe_file_title = ''.join(c for c in result['title']
-                                                  if c in FILENAME_SAFE_CHARS)
+                        safe_file_title = sanitize_filename(result['title'])
                         if not safe_file_title:
                             safe_file_title = fileId
                     filename = os.path.join(targetFolder, safe_file_title)