Use "self-link" terminology

CHANGELOG.md

@@ -38,14 +38,15 @@ For the full list of changes, see the [0.9.0] release notes.
   [path_base_for_github_subdir]. Projects will need to adjust the value of
   [path_base_for_github_subdir] to be relative to the file's physical location.
 
-- Docsy statically generates anchor links after headings using Hugo's
+- Docsy statically generates heading self links using Hugo's
   [render-heading.html](https://gohugo.io/templates/render-hooks/) hook. This is
-  _potentially_ a breaking change for projects that override the hook.
+  _potentially_ a breaking change for projects that override that hook, or make
+  direct use of `assets/js/anchor.js` (which has been deleted).
 
-  The default heading-link symbol is `#`, but it can be customized via the
-  `.td-heading-link` class. Projects can also _reuse_ (in their own heading
-  render hooks) or _override_ the heading-link template
-  `_default/_markup/_heading-link.html` under `layouts`.
+  The default heading self-link symbol is `#`, but it can be customized via the
+  `.td-heading-self-link` class. Projects can also _reuse_ (in their own heading
+  render hooks) or _override_ the heading self-link layout
+  `_default/_markup/_td-heading-self-link.html`.
 
 - The footer layout has been factored into parts: left, right, and center, with
   copyright a subpart of center. Each part has its own style tag, for example:

assets/scss/_content.scss

@@ -95,7 +95,7 @@
   }
 }
 
-.td-heading-link {
+.td-heading-self-link {
   &:before {
     content: '#';
   }
@@ -114,7 +114,7 @@
 }
 
 @for $i from 1 through 6 {
-  h#{$i}:hover > .td-heading-link {
+  h#{$i}:hover > .td-heading-self-link {
     visibility: visible;
   }
 }

layouts/_default/_markup/_td-heading-self-link.html

@@ -0,0 +1,2 @@
+<a class="td-heading-self-link" href="#{{ .Anchor | safeURL }}" aria-label="Heading self-link"></a>
+{{- /* Trim WS */ -}}

layouts/_default/_markup/render-heading.html

@@ -1,4 +1,5 @@
 <h{{ .Level }} id="{{- .Anchor | safeURL -}}">
   {{- .Text | safeHTML -}}
-  {{ template "_default/_markup/_heading-link.html" . -}}
-</h{{ .Level }}>
+  {{ template "_default/_markup/_td-heading-self-link.html" . -}}
+</h{{ .Level }}>
+{{- /* Trim WS */ -}}