[texhax] list starting theorem (was List of Examples)

[Uwe Lueck]

I wrote
> %% ... list spacing that is suppressed by \\@nobreaktrue
> \@afterheading
> %% ... probably needed for \\@nobreakfalse ASAP

Having searched latex.ltx for `\@nobreak' with editor Vim
so often, I seem to forget that there are circumstances
without a need to double backslashes.

Next one might detect a list starting a theorem environment
by \@ifnextchar etc.

Cheers,

    Uwe.