Rollup merge of #83156 - nagisa:nagisa/sans-serif-please, r=GuillaumeGomez

Fall-back to sans-serif if Arial is not available

Otherwise on systems where Arial is not available the UA will
fallback to a serif font, rather than a sans-serif one.

This is especially relevant on acessibility-conscious setups (such as is
mine) that have web-fonts disabled and a limited set of fonts available
on the system.

r? ```@GuillaumeGomez``` cc ```@jsha```

diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index 27f1ea78ad2f4faf504db438d151b89de62088bf..4f287cde73b1b2597e66f848682463b21ed584d8 100644 (file)
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -136,11 +136,12 @@ h1, h2, h3, h4,
 #source-sidebar, #sidebar-toggle,
 /* This selector is for the items listed in the "all items" page. */
 #main > ul.docblock > li > a {
-       font-family: "Fira Sans", Arial;
+       font-family: "Fira Sans", Arial, sans-serif;
 }
 
 .content ul.crate a.crate {
-       font: 16px/1.6 "Fira Sans";
+       font-size: 16px/1.6;
+       font-family: "Fira Sans", Arial, sans-serif;
 }
 
 ol, ul {
@@ -482,7 +483,7 @@ h4 > code, h3 > code, .invisible > code {
 }
 #main > .since {
        top: inherit;
-       font-family: "Fira Sans", Arial;
+       font-family: "Fira Sans", Arial, sans-serif;
 }
 
 .content table:not(.table-display) {
@@ -1301,7 +1302,7 @@ h4 > .notable-traits {
 
 .help-button {
        right: 30px;
-       font-family: "Fira Sans", Arial;
+       font-family: "Fira Sans", Arial, sans-serif;
        text-align: center;
        font-size: 17px;
 }