Apply some anchor fixes from muse--main--1.0 (253).
* experimental/muse-xml.el (muse-xml-insert-anchor)
(muse-xml-markup-anchor): Make sure we don't blow away the text just
before an anchor. On all types but texinfo, insert a newline
immediately after the anchor.
* lisp/muse-docbook.el (muse-docbook-insert-anchor)
(muse-docbook-markup-anchor): Ditto.
* lisp/muse-html.el (muse-html-insert-anchor)
(muse-html-markup-anchor): Ditto.
* lisp/muse-texinfo.el (muse-texinfo-insert-anchor)
(muse-texinfo-markup-anchor): Ditto.
* lisp/muse-publish.el (muse-publish-markup-regexps): Make text before
the anchor the first match group.
* lisp/muse-latex.el (muse-latex-insert-anchor)
(muse-latex-markup-anchor): Ditto.
git-archimport-id: mwolson@gnu.org--2005/muse--rel--3.02--patch-2