Rollup merge of rust-lang#100718 - GuillaumeGomez:fix-item-info, r=jsha

[rustdoc] Fix item info display

Fixes  rust-lang#100369.

The solution I came up with was simply to wrap the "text part" of the `item-info` into another span so that `flex` wouldn't mess with it.

Live demo is [here](https://rustdoc.crud.net/imperio/fix-item-info/foo/struct.ItemInfo.html).

r? `@jsha`

Author: matthiaskrgr

src/librustdoc/html/render/mod.rs

@@ -569,7 +569,10 @@ fn short_item_info(
             message.push_str(&format!(": {}", html.into_string()));
         }
         extra_info.push(format!(
-            "<div class=\"stab deprecated\"><span class=\"emoji\">👎</span> {}</div>",
+            "<div class=\"stab deprecated\">\
+                 <span class=\"emoji\">👎</span>\
+                 <span>{}</span>\
+             </div>",
             message,
         ));
     }
@@ -582,8 +585,9 @@ fn short_item_info(
         .filter(|stab| stab.feature != sym::rustc_private)
         .map(|stab| (stab.level, stab.feature))
     {
-        let mut message =
-            "<span class=\"emoji\">🔬</span> This is a nightly-only experimental API.".to_owned();
+        let mut message = "<span class=\"emoji\">🔬</span>\
+             <span>This is a nightly-only experimental API."
+            .to_owned();
 
         let mut feature = format!("<code>{}</code>", Escape(feature.as_str()));
         if let (Some(url), Some(issue)) = (&cx.shared.issue_tracker_base_url, issue) {
@@ -594,7 +598,7 @@ fn short_item_info(
             ));
         }
 
-        message.push_str(&format!(" ({})", feature));
+        message.push_str(&format!(" ({})</span>", feature));
 
         extra_info.push(format!("<div class=\"stab unstable\">{}</div>", message));
     }

src/librustdoc/html/static/css/rustdoc.css

@@ -1164,6 +1164,7 @@ so that we can apply CSS-filters to change the arrow color in themes */
 
 .stab .emoji {
 	font-size: 1.25rem;
+	margin-right: 0.3rem;
 }
 
 /* Black one-pixel outline around emoji shapes */

src/test/rustdoc/issue-32374.rs

@@ -8,20 +8,24 @@
 //      'Experimental'
 // @matches issue_32374/index.html '//*[@class="item-right docblock-short"]/text()' 'Docs'
 
-// @has issue_32374/struct.T.html '//*[@class="stab deprecated"]' \
-//      '👎 Deprecated since 1.0.0: text'
+// @has issue_32374/struct.T.html '//*[@class="stab deprecated"]/span' '👎'
+// @has issue_32374/struct.T.html '//*[@class="stab deprecated"]/span' \
+//      'Deprecated since 1.0.0: text'
 // @hasraw - '<code>test</code>&nbsp;<a href="https://issue_url/32374">#32374</a>'
+// @matches issue_32374/struct.T.html '//*[@class="stab unstable"]' '🔬'
 // @matches issue_32374/struct.T.html '//*[@class="stab unstable"]' \
-//      '🔬 This is a nightly-only experimental API. \(test\s#32374\)$'
+//     'This is a nightly-only experimental API. \(test\s#32374\)$'
 /// Docs
 #[deprecated(since = "1.0.0", note = "text")]
 #[unstable(feature = "test", issue = "32374")]
 pub struct T;
 
+// @has issue_32374/struct.U.html '//*[@class="stab deprecated"]' '👎'
 // @has issue_32374/struct.U.html '//*[@class="stab deprecated"]' \
-//      '👎 Deprecated since 1.0.0: deprecated'
+//     'Deprecated since 1.0.0: deprecated'
+// @has issue_32374/struct.U.html '//*[@class="stab unstable"]' '🔬'
 // @has issue_32374/struct.U.html '//*[@class="stab unstable"]' \
-//      '🔬 This is a nightly-only experimental API. (test #32374)'
+//     'This is a nightly-only experimental API. (test #32374)'
 #[deprecated(since = "1.0.0", note = "deprecated")]
 #[unstable(feature = "test", issue = "32374", reason = "unstable")]
 pub struct U;