fix a few direcives

doc/bugs/Allow_overriding_of_symlink_restriction.mdwn

@@ -136,4 +136,4 @@ like this being accepted before I bothered.
 
 >>>> That patch is applied now. --[[Joey]]
 
-[[tag done]]
+[[!tag done]]

doc/bugs/Graphviz_plug-in_directive_changed_in_2.60.mdwn

@@ -8,4 +8,4 @@ Personally, I like the new directive name better since it will allow us to add o
 
 > No, that change was not made intentionally. I don't want to bother people
 > with such a transition. Though it would be nice if it had a less generic
-> name. Changed back. [[tag done]] --[[Joey]]
+> name. Changed back. [[!tag done]] --[[Joey]]

doc/bugs/Please_avoid_using___39__cp_-a__39___in_Makefile.PL.mdwn

@@ -74,4 +74,4 @@ Please restore the old behaviour of using 'install' :-)
      	install -d $(DESTDIR)$(PREFIX)/share/man/man1
      	install -m 644 ikiwiki.man $(DESTDIR)$(PREFIX)/share/man/man1/ikiwiki.1
 
-[[tag done]]
+[[!tag done]]

doc/bugs/map_is_inconsistent_about_bare_directories.mdwn

@@ -83,4 +83,4 @@ Note: This patch adds items to a map while it is in a foreach loop over a sorted
 > annyoingly complicated bug.. I think I've fixed the underlying bug now.
 > --[[Joey]]
 > 
-> [[tag done]]
+> [[!tag done]]

doc/bugs/markdown_bug:_email_escaping_and_plus_addresses.mdwn

@@ -18,7 +18,8 @@ It seems putting a '+' in there throws it. Maybe it's a markdown bug, or maybe t
 > htmlscrubber then (rightly) removes this unknown tag.
 >
 
->> Filed [in CPAN](http://rt.cpan.org/Ticket/Display.html?id=37909) --[[Joey]] [[tag done]]
+>> Filed [in CPAN](http://rt.cpan.org/Ticket/Display.html?id=37909)
+>> --[[Joey]] [[!tag done]]
 
 > But I've noticed some other Text::Markdown bugs that, even with htmlscrubber, produce
 > [ill-formed (X)HTML](http://validator.w3.org/check?uri=http%3A%2F%2Fikiwiki.info%2Fbugs%2Fmarkdown_bug%3A_email_escaping_and_plus_addresses%2F).