title: How do I insert a specific character along all lines on a specific column in Vim?
body: <pre><code> Dates
  =======
  
   Name                                   | Date
  -------------------------------------------------
  * Battle of the Plains of Abraham       | September 13, 1759
  * Proclamation Act                      | October   07, 1763
  * Stamp Act                             | March     22, 1765
  * Guy Carleton becomes Governor         | April     07, 1766
  * Boston Tea Party                      | December  16, 1773
  * Quebec Act                            |
  * Declaration of Independance           | &lt;====== # How do I insert this bar character
  * Treaty of Paris                                 # along the whole column?
  * Constitutional Act                
  * French Revolution                 
  * War of 1812
  </code></pre>
  
  <p>I want to be able to insert that bar character without having to manually go and insert it. 
  While this is not syntactically correct, this is supposed to be markdown.</p>