rustdoc: whitelist the headers that get a § on hover.

Previously the :hover rules were making the links to the traits/types in
something like

    impl<K: Hash + Eq, V> ... { ... }

be displayed with a trailing `§` when hovered over. This commit
restricts that behaviour to specific headers, i.e. those that are known
to be section headers (like those rendered in markdown doc-comments, and
the "Modules", "Functions" etc. headings).

1 files changed, 6 insertions, 11 deletions

diff --git a/src/librustdoc/html/static/main.css b/src/librustdoc/html/static/main.css
index f2c10f053c2..2c7e5f0f675 100644
--- a/src/librustdoc/html/static/main.css
+++ b/src/librustdoc/html/static/main.css
@@ -317,16 +317,11 @@ pre.rust .doccomment { color: #4D4D4C; }
 pre.rust .macro, pre.rust .macro-nonterminal { color: #3E999F; }
 pre.rust .lifetime { color: #B76514; }
 
-h1:hover a:after,
-h2:hover a:after,
-h3:hover a:after,
-h4:hover a:after,
-h5:hover a:after,
-h6:hover a:after {
+h1.section-link:hover a:after,
+h2.section-link:hover a:after,
+h3.section-link:hover a:after,
+h4.section-link:hover a:after,
+h5.section-link:hover a:after,
+h6.section-link:hover a:after {
   content: ' § ';
 }
-
-h1.fqn:hover a:after,
-:hover a.fnname:after {
-  content: none;
-}