message: Fixed the html rendering for the first row
diff: @@ -51,10 +51,10 @@ For the definition and defaults of <I>RandGenParams</I>, see this document and f
  </tr>
  <tr bgcolor="silver">
  - <td><a href="append_column.html">append_column</a>( 2 )</td>
  - <td>enum class <a href="concat_policy.html">concat_policy</a>{ }</td>
  - <td>struct <a href="AffinityPropVisitor.html">AffinityPropVisitor</a>{ }</td>
  - <td><a href="gen_bernoulli_dist.html">gen_bernoulli_dist</a>{ }</td>
  + <td><a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/append_column.html">append_column</a>( 2 )</td>
  + <td>enum class <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/concat_policy.html">concat_policy</a>{ }</td>
  + <td>struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/AffinityPropVisitor.html">AffinityPropVisitor</a>{ }</td>
  + <td><a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/gen_bernoulli_dist.html">gen_bernoulli_dist</a>{ }</td>
  </tr>
  <tr bgcolor="lightgrey">
  