RE: Blanks and underscores in html links

On Tue, 26 Apr 2011, Karl Williamson wrote:
> 
> Look at
> http://search.cpan.org/~rjbs/perl-5.12.3/pod/perlsyn.pod
> 
> There is a heading in the original source
> =head2 Switch statements

If you look closely, the heading is actually:

| =head2 Switch statements
| X<switch> X<case> X<given> X<when> X<default>

Everything up to the paragraph separator is part of the headline.

> The anchor that is generated somehow on the web is
> <h2><a class='u' href='#___top' title='click to go to top of document'
> name="Switch_statements_____"
>  >Switch statements ...
> 
> Note that the space in the original is translated into an underscore,
> and the addition of several trailing underscores.  This means that the
> link on the page that goes like
> See also L</"Switch statements">.
> 
> doesn't work, as it gets translated into
> <a href="#Switch_statements" class="podlinkpod"
> 
> Can someone explain the trailing underscores?

The trailing underscores correspond to the spaces before and between the
X<> elements at the end of the heading.

Cheers,
-Jan