Rename the table of contents settings

- font matter: tableofcontents -> toc
- config: tableOfContentsWordCount -> tocWordThreshold

layouts/_default/single.html

@@ -11,7 +11,7 @@
       {{- end }}
     </div>
   </div>
-  {{ if or (.Params.tableofcontents) (and (ne .Params.tableofcontents false) (isset .Site.Params "tableofcontentswordcount") (ge .Site.Params.TableOfContentsWordCount 0) (gt .WordCount .Site.Params.TableOfContentsWordCount)) }}
+  {{ if or (.Params.toc) (and (ne .Params.toc false) (isset .Site.Params "tocwordthreshold") (ge .Site.Params.TocWordThreshold 0) (gt .WordCount .Site.Params.TocWordThreshold)) }}
     {{/* If the front matter parameter is true, show the toc */}}
     {{/* Elif the front matter parameter is false, don't show the toc */}}
     {{/* Elif the front matter parameter is not set, show the toc if the site parameter is set, non-negative, and less than the word count */}}
@@ -21,6 +21,7 @@
           <span class="table-of-contents-title">Table of Contents</span>
         </summary>
         {{ $toc := .TableOfContents -}}
+        {{/* Workaround for an extra layer of indentation (https://discourse.gohugo.io/t/2303) */}}
         {{- $toc := replaceRE `<nav(.*)>(\s?)<ul>\s?<li>\s?<ul>` `<nav${1}>${2}<ul>` $toc -}}
         {{- $toc := replaceRE `</ul>\s?</li>\s?</ul>(\s?)</nav>` `</ul>${1}</nav>` $toc -}}
         {{- safeHTML $toc }}