Fixes #21195: Add more table of contents to pages with longer contents

docs/utilities/spacing.md

@@ -6,6 +6,11 @@ group: utilities
 
 Assign responsive-friendly `margin` or `padding` values to an element or a subset of its sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. Classes are built from a default Sass map ranging from `.25rem` to `3rem`.
 
+## Contents
+
+* Will be replaced with the ToC, excluding the "Contents" header
+{:toc}
+
 ## Notation
 
 Spacing utilities that apply to all breakpoints, from `xs` to `xl`, have no breakpoint abbreviation in them. This is because those classes are applied from `min-width: 0` and up, and thus are not bound by a media query. The remaining breakpoints, however, do include a breakpoint abbreviation.

docs/utilities/typography.md

@@ -6,6 +6,11 @@ group: utilities
 
 The following utilities can be used to add additional styles to texts.
 
+## Contents
+
+* Will be replaced with the ToC, excluding the "Contents" header
+{:toc}
+
 ## Text alignment
 
 Easily realign text to components with text alignment classes.