Re: r150960 changed ltmain.sh and broke the build

[Paolo Bonzini]

> But maybe '%' has some merit, although it can occur in
> unquoted filenames.

I think we should go with '%' or maybe '!'.

>  What about ';' - are there any regex
> engines that attach meaning to either ; or \;?

No, but having "s;a;b;g;" be different from "s;a;b;;g;" would not be nice...

> I see several s||| in the manual, along with the explicit
> recommendation for 's|||', followed by 's,,,', rather than 's///' [1].
> I also see several instances of 's,,,' that we should probably
> adjust, given this thread.  Meanwhile, I also found things
> like [2], where we made a sweep through the source to replace
> 's,,,' with 's|||'.

That's fine because we are careful not to use unportable regex.  There 
are many occurrences of \| in the wild.

Paolo