ssh: mark all keyword arguments as keyword-only

We would never dare to use them otherwise, and type hints overloads will
require to order them differently in some overloads.

Signed-off-by: Yann Dirson <[email protected]>

Author: ydirson

lib/commands.py

@@ -145,8 +145,8 @@ def _ssh(hostname_or_ip, cmd, check, simple_output, suppress_fingerprint_warning
 # The actual code is in _ssh().
 # This function is kept short for shorter pytest traces upon SSH failures, which are common,
 # as pytest prints the whole function definition that raised the SSHCommandFailed exception
-def ssh(hostname_or_ip, cmd, check=True, simple_output=True, suppress_fingerprint_warnings=True, background=False,
-        target_os='linux', decode=True, options=[]) -> Union[SSHResult, str, bytes, subprocess.Popen]:
+def ssh(hostname_or_ip, cmd, *, check=True, simple_output=True, suppress_fingerprint_warnings=True,
+        background=False, target_os='linux', decode=True, options=[]):
     result_or_exc = _ssh(hostname_or_ip, cmd, check, simple_output, suppress_fingerprint_warnings,
                          background, target_os, decode, options)
     if isinstance(result_or_exc, SSHCommandFailed):