fix: update message that plugin config must be a single line

Author: sijis

errbot/core_plugins/plugins.py

@@ -167,7 +167,7 @@ def plugin_config(self, _, args):
 
         if len(args) == 1:
             response = (
-                f"Default configuration for this plugin (you can copy and paste this directly as a command):"
+                f"Default configuration for this plugin (you can copy and paste this directly as a command in a single line):"
                 f"\n\n```\n{self._bot.prefix}plugin config {plugin_name} {pformat(template_obj)}\n```"
             )
 

tests/commands_test.py

@@ -75,7 +75,7 @@ def test_config_cycle(testbot):
     testbot.push_message("!plugin config Webserver")
     m = testbot.pop_message()
     assert (
-        "Default configuration for this plugin (you can copy and paste this directly as a command)"
+        "Default configuration for this plugin (you can copy and paste this directly as a command in a single line)"
         in m
     )
     assert "Current configuration" not in m