Show "Read More" for pages with explicit summary

layouts/_default/summary.html

@@ -10,7 +10,7 @@
     <section class="p-summary">
         {{ .Summary }}
     </section>
-    {{- if .Truncated }}
+    {{- if or .Truncated (gt .FuzzyWordCount 100) }}
     <footer>
         <a href='{{ .Permalink }}'>
             <span style="white-space: nowrap;">Read more →</span>