Updated comment upon feedback

Signed-off-by: Martin Vrachev <[email protected]>

Author: MVrachev

tuf/repository_lib.py

@@ -1476,7 +1476,7 @@ def generate_snapshot_metadata(metadata_directory, version, expiration_date,
   metadata_directory = _check_directory(metadata_directory)
 
   # Snapshot's 'fileinfodict' shall contain the version number of Root,
-  # Targets, and all delegated roles to the repository.
+  # Targets, and all delegated roles of the repository.
   fileinfodict = {}
   fileinfodict[TARGETS_FILENAME] = get_metadata_versioninfo(targets_filename,
       repository_name)