[BUG] Command truncated after && in alias

[fourjr]

Describe the bug
When an alias is created, such as a reply or edit alias, the message content sill be truncated at && due to multistep aliases.

Bot Info
Bot version (check with @modmail about): 3.5.1dev2
Host method (Heroku, self-host, etc): selfhost

To Reproduce
Steps to reproduce the behavior:

1. Who can reproduce (ex. anyone, owners)? Mods
2. Where can it be reproduced (ex. in thread channels, recipient DM's)? Thread channels
3. Done what to cause the error?

• Create alias ?r alias add reply r
• Do ?r hi && hello
• Only hi is sent

4. Any recently made changes to your bot? no
5. Errored

Error Logs
If your Modmail bot is online, type @modmail debug hastebin and include the link here.
If your Modmail bot is not online or the previous command did not generate a link, do the following:

1. Select your bot application at https://dashboard.heroku.com
2. Restart your bot
3. Reproduce the error to populate the error logs
4. Copy and paste the logs
   NIL

Screenshots
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Additional context
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