tramp-shell-prompt-pattern

tramp-shell-prompt-pattern is a variable defined in `tramp.el'.
Its value is

"\\(?:^\\|
\\)[^]#$%>\n]*#?[]#$%>] *\\(\\[[0-9;]*[a-zA-Z] *\\)*"

Documentation:
Regexp to match prompts from remote shell.
Normally, Tramp expects you to configure `shell-prompt-pattern'
correctly, but sometimes it happens that you are connecting to a
remote host which sends a different kind of shell prompt. Therefore,
Tramp recognizes things matched by `shell-prompt-pattern' as prompt,
and also things matched by this variable. The default value of this
variable is similar to the default value of `shell-prompt-pattern',
which should work well in many cases.

This regexp must match both `tramp-initial-end-of-output' and
`tramp-end-of-output'.

You can customize this variable.