Warning when getting help

### Describe the bug

Some aws commands generate warning related to strings, when asking for help.

### Expected Behavior

Help pages shouldn't generate warnings.

### Current Behavior

This is just example, there are many help pages that generate the warning.

```
=$ aws apprunner disassociate-custom-domain help > /dev/null
:298: (WARNING/2) Inline literal start-string without end-string.
```

### Reproduction Steps

Run `help` on some aws commands, and redirect help to /dev/null to see the warning.

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CLI version used

aws-cli/2.15.4 Python/3.11.6 Linux/6.5.0-5-amd64 exe/x86_64.debian prompt/off

### Environment details (OS name and version, etc.)

Linux Debian (trixie). Kernel 6.5.0-5-amd64; Python 3.11.7