feat: request to file bug when libmedium encounters unknown formatting rules

templates/post.html

@@ -26,7 +26,7 @@
          <. if p.type_ == "IMG" {.>
             <. include!("./img.html"); .> 
           <.} else if p.type_ == "P" {.>
-            <. include!("./p.html"); .>
+              <p><. include!("./_markup.html"); .></p>
           <.} else if p.type_ == "H2" {.>
             <h2><.= p.text .></h2>
           <.} else if p.type_ == "H3" {.>
@@ -48,7 +48,22 @@
             <.} else {.>
               <iframe src="<.= src .>" frameborder="0"></iframe>
             <.}.>
-          <.}.>
+            <.} else {.>
+                  <p>
+                    <. include!("./_markup.html"); .>
+                  </p>
+                  <p class="libmedium__meta">
+                    <b>From LibMedium:</b> LibMedium is built by reverse
+                    engineering the Meduim's internal API. This post contains
+                    markup(formatting rules) that we are unaware of.
+                    Please report this URL <a
+                    href="https://github.com/realaravinth/libmedium/issues/1"
+                    rel="noreferrer">on our bug tracker</a> so that we can
+                    improve page rendering.
+                    <br />
+                    Alternatively, you can also email me at realaravinth at batsense dot net!
+                  </p>
+            <.}.>
         <.}.>
       </article>
   </main>