Add table of contents mixin

website/_includes/_mixins.jade

@@ -383,3 +383,14 @@ mixin annotation-row(annots, style)
             else
                 +cell=cell
         block
+
+
+//- Table of contents, to be used with +item mixins for links
+    col - [string] width of column (see +grid-col)
+
+mixin table-of-contents(col)
+    +grid-col(col || "half")
+        +infobox
+            +label.o-block-small Table of contents
+            +list("numbers").u-text-small.o-no-block
+                block

website/docs/usage/spacy-101.jade

@@ -38,10 +38,7 @@ p
             |  #[strong natural language understanding] systems, or to
             |  pre-process text for #[strong deep learning].
 
-    +grid-col("half")
-        +infobox
-            +label.o-block-small Table of contents
-            +list("numbers").u-text-small.o-no-block
+    +table-of-contents
         +item #[+a("#features") Features]
         +item #[+a("#annotations") Linguistic annotations]
         +item #[+a("#annotations-token") Tokenization]