Fixed typo. (Type-checking is good for you...)

Rev: lib/modules/Protocols.pmod/IMAP.pmod/parse_line.pike:1.23

lib/modules/Protocols.pmod/IMAP.pmod/parse_line.pike

@@ -168,7 +168,7 @@ mapping get_token(int eol, int accept_options)
     string s = get_string();
     return s && ([ "type" : "string", "string" : s ]);
   }
-  case "{": {
+  case '{': {
     object s = get_string();
     return s && ([ "type" : "literal", "length" : s->length ]);
   }