bug#37953: tramp: a local bash does not start

[Koichi Arakawa <arakawa@pp.iij4u.or.jp>]

Hi

I'm using Emacs in the MSYS2 environment. And the local shell bash
depends on the order of its command-line switches.

When the last argument is "-i", bash starts normally.

    >C:/msys64/usr/bin/bash -norc -noprofile -i
    bash-4.4$

But in another case, it ends with an error.

    >C:/msys64/usr/bin/bash -i -norc -noprofile
    /usr/bin/bash: line 0: /usr/bin/bash: -noprofile: invalid option name

So I think we need the following patch to fix that.

Best regards,
Koichi Arakawa

--- tramp-sh.el.~1~     2019-10-20 10:48:27.300959800 +0900
+++ tramp-sh.el 2019-10-28 08:47:12.048207800 +0900
@@ -4877,9 +4877,9 @@
                           (tramp-get-connection-buffer vec)
                           (append
                            (list tramp-encoding-shell)
+                           (and extra-args (split-string extra-args))
                            (and tramp-encoding-command-interactive
-                                (list tramp-encoding-command-interactive))
-                           (and extra-args (split-string extra-args)))))))
+                                (list tramp-encoding-command-interactive)))))))

                ;; Set sentinel and query flag.  Initialize variables.
                (set-process-sentinel p #'tramp-process-sentinel)