Use dedicated fonts for better support of mathematical symbols (#1919)

assets/scss/_variables_project.scss

@@ -40,15 +40,17 @@ $table-bg: $secondary-lightest-background;
 $td-enable-google-fonts: false;
 
 /*
- * Replace the default font with Inter.
- *
- * The $font-family-sans-serif definition here overrides the default value set by docsy:
- * https://github.com/matrix-org/docsy/blob/66a4e61d2d34edc7196b9df83a7d09cd4af14b47/assets/scss/_variables.scss#L68
- * and adds "Inter" to the front.
- *
- * The font itself is loaded via stylesheet link layouts/partials/hooks/head-end.html.
+ * The $font-family-sans-serif definition here overrides the default value set by docsy
+ * (https://github.com/matrix-org/docsy/blob/66a4e61d2d34edc7196b9df83a7d09cd4af14b47/assets/scss/_variables.scss#L68)
  */
-$font-family-sans-serif: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+$font-family-sans-serif:
+  // Add "Inter" to the front, making it the default. The font itself is loaded via stylesheet
+  // links in layouts/partials/hooks/head-end.html.
+  "Inter",
+  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
+  // Insert fonts suited for mathematical symbols on different platforms before "Arial"
+  "STIX Two Math", "Cambria Math", "Noto Sans Math", "Dejavu Sans",
+  Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
 
 // Disable smooth scrolling as it makes TOC highlighting jump during the transition.
 $enable-smooth-scroll: false;

changelogs/internal/newsfragments/1919.clarification

@@ -0,0 +1 @@
+Use dedicated fonts for better support of mathematical symbols.

content/rooms/fragments/v2-state-res.md

@@ -50,7 +50,7 @@ chain for each state *S*<sub>*i*</sub>, that is the union of the auth
 chains for each event in *S*<sub>*i*</sub>, and then taking every event
 that doesn't appear in every auth chain. If *C*<sub>*i*</sub> is the
 full auth chain of *S*<sub>*i*</sub>, then the auth difference is
- ∪ *C*<sub>*i*</sub> −  ∩ *C*<sub>*i*</sub>.
+∪ *C*<sub>*i*</sub> − ∩ *C*<sub>*i*</sub>.
 
 **Full conflicted set.**
 The *full conflicted set* is the union of the conflicted state set and