Jim Porter <jporterbugs@gmail.com> writes:
> On 10/22/2023 12:53 PM, sbaugh@catern.com wrote:
>> Andreas Schwab <schwab@linux-m68k.org> writes:
>> 
>>> On Okt 22 2023, sbaugh@catern.com wrote:
>>>
>>>> +Exec=emacsclient --alternate-editor= --eval '(message-mailto (pop server-eval-args-left))' %u
>>>
>>> This line is not valid according to the specs.
>> Is that because of the single quotes surrounding spaces?  Are quoted
>> strings not permitted?
>
> According to the spec[1], you should use double quotes instead:
>
>> Quoting must be done by enclosing the argument between double quotes and escaping the double quote character, backtick character ("`"), dollar sign ("$") and backslash character ("\") by preceding it with an additional backslash character.
>
> Otherwise, I think what you have above is ok.
>
> [1]
> https://specifications.freedesktop.org/desktop-entry-spec/latest/ar01s07.html

Thanks.  OK, spec-compliant version: