bug#6980: Could goto-char please have its own history list?

[Juri Linkov <juri@jurta.org>]

>> > I can't see no reason its history should be mixed by something else.
>> > (More than devel historic reasons ;-)
>>
>> It makes sense to share the same history that contains only numeric
>> values between all commands that use `read-number', like
>> e.g. `goto-line' and `goto-char' (with some changes), because
>> non-numeric values (added to the history from other commands)
>> are useless for such number-reading commands.
>
> I don't have much of an opinion about the suggestion.
> There are always pros & cons to making a history more or less specific.
>
> But I'll point out that just because non-numeric histories are inappropriate for
> numeric input does not mean that the same numeric history should be used for all
> numeric inputs.

Yes, not all number-reading commands should share the numeric history.

For instance, version-control commands that read a revision number
can also accept non-numeric values like "submit:".  So every case
should be carefully considered on its own.