use span instead of div for since version

src/librustdoc/html/render.rs

@@ -3410,7 +3410,7 @@ fn render_stability_since_raw<'a, T: fmt::Write>(
 ) -> fmt::Result {
     if let Some(v) = ver {
         if containing_ver != ver && v.len() > 0 {
-            write!(w, "<div class='since' title='Stable since Rust version {0}'>{0}</div>", v)?
+            write!(w, "<span class='since' title='Stable since Rust version {0}'>{0}</span>", v)?
         }
     }
     Ok(())

src/librustdoc/html/static/rustdoc.css

@@ -914,7 +914,7 @@ h3 > .collapse-toggle, h4 > .collapse-toggle {
 	height: 12px;
 }
 
-span.since {
+.out-of-band > span.since {
 	position: initial;
 	font-size: 20px;
 	margin-right: 5px;

src/test/rustdoc/assoc-consts-version.rs

@@ -1,5 +1,3 @@
-// ignore-tidy-linelength
-
 #![crate_name = "foo"]
 
 #![feature(staged_api)]
@@ -10,7 +8,8 @@
 pub struct SomeStruct;
 
 impl SomeStruct {
-    // @has 'foo/struct.SomeStruct.html' '//*[@id="associatedconstant.SOME_CONST"]//div[@class="since"]' '1.1.2'
+    // @has 'foo/struct.SomeStruct.html' \
+    //   '//*[@id="associatedconstant.SOME_CONST"]//span[@class="since"]' '1.1.2'
     #[stable(since="1.1.2", feature="rust2")]
     pub const SOME_CONST: usize = 0;
 }