bug#23179: 25.0.92; Restore `M-,' to continue etags search

[Juri Linkov]

>>    M-x project-search
>>
>>      1. can't use M-n to get the default value such as a word under point
>>         like project-find-regexp does
>
> fileloop-initialize-search could set up next-error-function, I suppose.

This is fine, but the point was about the minibuffer prompt.

>>    M-x fileloop-continue
>>
>>      2. its name prefix is inconsistent with the prefix of its
>>         counterpart command project-search
>
> It doesn't have to. fileloop-continue is intended to be used with different
> commands (e.g. some with dired- prefix as well).

Maybe an alias with another prefix is in order?

>>      3. no keybinding
>
> There's no keybinding for project-search either. The user is welcome to
> choose some.

Maybe 'M-g M-n'?

>>    M-x project-find-regexp
>>
>>      4. shouldn't it support an optional more compact grep-like output
>>         layout as well (where file names are on the same line with matches)?
>
> You can implement that via a custom xref-show-xrefs-function. Not trivial,
> but not a huge amount of work either.

Good to know that xref is so much customizable.