bug#55696: 28.1; eshell fails to respect text-scale-increase

[Jim Porter]

On 6/9/2022 10:52 PM, Eli Zaretskii wrote:
> What if there's an external command named 'listify' -- is there any
> chance that the test will invoke it?  If so, I think we should come up
> with a safer solution.

No, that shouldn't be a problem. When Eshell executes something that 
looks like a shell command[1], the order of precedence is this:

1. If an alias for the command exists in .emacs.d/eshell/aliases, use 
that. (This won't happen in tests, since `eshell-test-command-result' 
binds `eshell-directory-name' to a temp dir.)

2. If there's a Lisp function named `eshell/COMMAND', use that.

3. If there's an external command named `COMMAND', use that.

4. If there's a Lisp function named `COMMAND', use that.

> Otherwise, feel free to install the change, and thanks.

Thanks. (I don't have direct commit access, so hopefully you or someone 
else with commit access can install it when you/they get the chance.)

[1] Something like 'COMMAND args' or 'echo ${COMMAND args}'.