Change {%} to {?}

README.md

@@ -50,7 +50,7 @@ Sherlock: Find Usernames Across Social Networks (Version 0.14.2)
 
 positional arguments:
   USERNAMES             One or more usernames to check with social networks.
-                        Check similar usernames using {%} (replace to '_', '-', '.').
+                        Check similar usernames using {?} (replace to '_', '-', '.').
 
 optional arguments:
   -h, --help            show this help message and exit

sherlock/sherlock.py

@@ -551,7 +551,7 @@ def main():
     parser.add_argument("username",
                         nargs="+", metavar="USERNAMES",
                         action="store",
-                        help="One or more usernames to check with social networks. Check similar usernames using {%%} (replace to '_', '-', '.')."
+                        help="One or more usernames to check with social networks. Check similar usernames using {?} (replace to '_', '-', '.')."
                         )
     parser.add_argument("--browse", "-b",
                         action="store_true", dest="browse", default=False,