update warning word.

Author: Nathan Huang

README.md

@@ -63,8 +63,8 @@ $ sudo apt-get install mycli # Only on debian or ubuntu
       --ssh-password TEXT           Password to connect to ssh server.
       --ssh-key-filename TEXT       Private key filename (identify file) for the
                                     ssh connection.
-      --ssh-config-path TEXT        Path to ssh configuation
-      --ssh-config-host TEXT        Host for ssh server in ssh configuations
+      --ssh-config-path TEXT        Path to ssh configuation.
+      --ssh-config-host TEXT        Host for ssh server in ssh configuations (requires paramiko).
       --ssl-ca PATH                 CA file in PEM format.
       --ssl-capath TEXT             CA directory.
       --ssl-cert PATH               X509 cert in PEM format.
@@ -80,7 +80,7 @@ $ sudo apt-get install mycli # Only on debian or ubuntu
                                     section of myclirc file.
       --list-dsn                    list of DSN configured into the [alias_dsn]
                                     section of myclirc file.
-      --list-ssh-config             list of ssh configuration in the ssh config.
+      --list-ssh-config             list ssh configurations in the ssh config (requires paramiko).
       -R, --prompt TEXT             Prompt format (Default: "\t \u@\h:\d> ").
       -l, --logfile FILENAME        Log every query and its results to a file.
       --defaults-group-suffix TEXT  Read MySQL config groups with the specified

mycli/main.py

@@ -1006,7 +1006,7 @@ def get_last_query(self):
 @click.option('--list-dsn', 'list_dsn', is_flag=True,
         help='list of DSN configured into the [alias_dsn] section of myclirc file.')
 @click.option('--list-ssh-config', 'list_ssh_config', is_flag=True,
-              help='list of ssh configurations in the ssh config.')
+              help='list ssh configurations in the ssh config (requires paramiko).')
 @click.option('-R', '--prompt', 'prompt',
               help='Prompt format (Default: "{0}").'.format(
                   MyCli.default_prompt))
@@ -1079,8 +1079,7 @@ def cli(database, user, host, port, socket, password, dbname,
     if list_ssh_config:
         if not paramiko:
             click.secho(
-                "Cannot use SSH transport because paramiko isn't installed, "
-                "please install paramiko or don't use --list-ssh-config=",
+                "This features requires paramiko. Please install paramiko and try again.",
                 err=True, fg='red'
             )
             exit(1)
@@ -1155,8 +1154,7 @@ def cli(database, user, host, port, socket, password, dbname,
     if ssh_config_host:
         if not paramiko:
             click.secho(
-                "Cannot use SSH transport because paramiko isn't installed, "
-                "please install paramiko or don't use --ssh-config_host=",
+                "This features requires paramiko. Please install paramiko and try again.",
                 err=True, fg='red'
             )
             exit(1)