Sudo Prompt is present in process stdout with pty=True

[hrehfeld]

As mentioned in #1322 , pty=True implies that stdout and stderr are merged.

However, if using sudo, I would strongly classify it as a bug to not remove the sudo prompt:

import fabric
import getpass
with fabric.Connection(host='localhost') as c:
    c.config.sudo.password = getpass.getpass()
    r = c.sudo('cat /etc/passwd', pty=True)
    print('stdout=')
    print(r.stdout)

results in:

stdout=
[sudo] password: 
</etc/passwd file>

I would expect sudo() to remove the sudo prompt, e.g. something like this:

assert r.stdout.startswith(sudo_prompt)
r.stdout = r.stdout[len(sudo_prompt):]
return r