http-api: code eval adds a space at the end of the expression

[ryjm]

Describe the bug
When evaluating code in chat an extra space is added resulting in a syntax error
To Reproduce
Steps to reproduce the behavior:

1. Press code button
2. type valid expression and hint enter.
   Expected behavior*
   Doesn't add space to a valid expression

Operating context

• Device: thinkpad and macbook air
• OS: macOS and nixOS
• Browser: Safari and Brave

[fasner-bitful]

can confirm. trailing spaces should not be added, and possibly should even be actively deleted.