tidy up comments in marketing/support/variables.scss

Author: shawnbot

src/marketing/support/variables.scss

@@ -19,7 +19,7 @@ $marketing-font-path: "/fonts/" !default;
 
 $font-mktg: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol" !default;
 
-// Builds upon primer-support/variables/typography.scss
+// Builds upon @primer/css/support/variables/typography.scss
 $h000-size: 64px !default;
 $h000-size-mobile: 48px !default;
 
@@ -30,8 +30,9 @@ $blue-mktg: mix($blue-400, $blue-500, 42%) !default;
 // Animations
 $transition-time: 0.4s !default;
 
-// Increases primer-core scale first by 8px for spacer-7 then by 16px step increments for spacer-8 to spacer-12
-// i.e. After 40px, we have 48, 64, 80, 96, etc.
+// Increases the core spacing scale first by 8px for $spacer-7, then by 16px
+// increments from $spacer-8 to $spacer-12, i.e. after 40px, we have 48, 64,
+// 80, 96, etc.
 $spacer-7:  $spacer * 6 !default;  // 48px
 $spacer-8:  $spacer * 8 !default;  // 64px
 $spacer-9:  $spacer * 10 !default; // 80px