minor details

external/contribute/markdown/markdown.md

@@ -34,7 +34,7 @@ Markdown is a lightweight markup language with plain text formatting syntax whic
 
 
 ## Tips to write in markdown:
-<table style="table-layout: fixed; width: 80%;white-space: normal">
+<table style="table-layout: fixed; width: 95%;white-space: normal">
   <thead>
   <tr>
     <th>Markdown</th>
@@ -151,7 +151,7 @@ Markdown is a lightweight markup language with plain text formatting syntax whic
 
       Or use HTML tag allowing you to alter the image properties (e.g. size):
 
-        &lt;img src="img/r3_logo.png" width="40"&gt
+        &lt;img src="img/r3_logo.png" width="40"&gt;
       </pre>
     </td>
     <td>