Store executable as part of pythonic process property.

`pythonic-proper-environment-p' can't use `process-command' for remote
interpreters because it will store "/bin/sh" instead of actual running
executable.

Author: proofit404

pythonic.el

@@ -210,6 +210,7 @@ process flag."
       (process-put process
                    'pythonic
                    (list
+                    :executable (pythonic-executable)
                     :connection (pythonic-tramp-connection)
                     :pythonpath (pythonic-get-pythonpath)
                     :path (pythonic-get-path)
@@ -220,7 +221,7 @@ process flag."
   "Determine if python environment has been changed since PROCESS was started."
   (--if-let (process-get process 'pythonic)
       (and
-       (equal (car (process-command process)) (pythonic-executable))
+       (equal (plist-get it :executable) (pythonic-executable))
        (equal (plist-get it :connection) (pythonic-tramp-connection))
        (equal (plist-get it :pythonpath) (pythonic-get-pythonpath))
        (equal (plist-get it :path) (pythonic-get-path))