Use `send_help` to invoke command help

After the refactoring of the help command, we need to use the built-in
method of calling the help command: `Context.send_help`. As an argument,
the qualified name (a string containing the full command path, including
parents) of the command can be passed.

Examples:

- await ctx.send_help("reminders edit")

This would send a help embed with information on `!reminders edit` to
the Context.

- await ctx.send_help(ctx.command.qualified_name)

This would extract the qualified name of the command, which is the full
command path, and send a help embed to Context.

- await ctx.send_help()

This will send the main "root" help embed to the Context.

1 files changed, 1 insertions, 2 deletions

diff --git a/tests/bot/cogs/test_snekbox.py b/tests/bot/cogs/test_snekbox.py
index 1dec0ccaf..190d41d66 100644
--- a/tests/bot/cogs/test_snekbox.py
+++ b/tests/bot/cogs/test_snekbox.py
@@ -209,9 +209,8 @@ class SnekboxTests(unittest.IsolatedAsyncioTestCase):
     async def test_eval_command_call_help(self):
         """Test if the eval command call the help command if no code is provided."""
         ctx = MockContext()
-        ctx.invoke = AsyncMock()
         await self.cog.eval_command.callback(self.cog, ctx=ctx, code='')
-        ctx.invoke.assert_called_once_with(self.bot.get_command("help"), "eval")
+        ctx.send_help.assert_called_once_with("eval")
 
     async def test_send_eval(self):
         """Test the send_eval function."""