RE: systemd @ in filenames not supported by thing-at-point

[Drew Adams <drew.adams@oracle.com>]

> However, with the lambasted systemd, files are
> sometimes include an "@", as in
>     /lib/systemd/system/getty@.service
> 
> I just now noticed that my function, or rather
> `thing-at-point', breaks on such paths because
> of this setting:
>     (defvar thing-at-point-file-name-chars "-~/[:alnum:]_.${}#%,:"
>       "Characters allowable in filenames.")
> 
> Because "@" isn't included, it is considered
> a file name delimiter and the path returned is
> incorrectly /lib/systemd/system/getty - with this:
> 
>     (setq thing-at-point-file-name-chars "@-~/[:alnum:]_.${}#%,:")
> it works as expected.
> But I don't know if that will break something else?

Looking at the code, it shouldn't break anything.  What's more,
I'd say that this variable should be a user option.  For one
thing, that would make clear to users that it won't break
anything to change the value. ;-)