Rollup merge of #96590 - notriddle:notriddle/tab-bar-fn-search, r=GuillaumeGomez,jsha

rustdoc: when running a function-signature search, tweak the tab bar

# Before

![In Names (7) / In Parameters (0) / In Return types (0)](https://user-images.githubusercontent.com/1593513/166122875-ffdeafe6-8d4d-4e61-84a6-f5986b50ac35.png)

# After

![In Function Signature (7)](https://user-images.githubusercontent.com/1593513/166122883-9a3d7515-3235-4ee3-8c4b-5401d109e099.png)

1 files changed, 5 insertions, 0 deletions

diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index 12059e0b9c4..eb3ce37e313 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1333,6 +1333,11 @@ pre.rust {
 	border-top: 2px solid;
 }
 
+#titles > button:first-child:last-child {
+	margin-right: 1px;
+	width: calc(100% - 1px);
+}
+
 #titles > button:not(:last-child) {
 	margin-right: 1px;
 	width: calc(33.3% - 1px);