Variable: tramp-method-regexp
tramp-method-regexp is a variable defined in tramp.el.gz.
Value
"-\\|[[:alnum:]]\\{2,\\}"
Documentation
Regexp matching method identifiers.
The ftp syntax does not support methods.
Source Code
;; Defined in /usr/src/emacs/lisp/net/tramp.el.gz
(defvar tramp-method-regexp nil ; Initialized when defining `tramp-syntax'!
"Regexp matching method identifiers.
The `ftp' syntax does not support methods.")