shr.el (shr-insert): Don't insert double spaces.

shr.el (shr-insert): Don't insert double spaces.
auth.texi (Help for users, GnuPG and EasyPG Assistant Configuration): Update docs.
gnus-registry.el, nnregistry.el: Remove nnregistry refer method auto-install and update docs.
gnus.texi (Finding the Parent, The Gnus Registry, Registry Article Refer Method): Update docs for nnregistry.el.
gnus-demon.el, gnus-group.el, gnus-msg.el, gnus-sum.el, gnus-util.el, gnus.el: Rename `gnus-pull' to `gnus-alist-pull'.
gnus.texi (Article Washing): Add mm-shr.
mm-decode.el (mm-text-html-renderer): Add mm-shr in choice list.