title: Add an extra letter to each line in existing file from a list in Python
body: <p>I have a file which has only + and - in 1 line and there are multiple lines.
  So basically file is as below.</p>
  
  <pre><code>-++++
  +----
  +++++
  </code></pre>
  
  <p>and I have a script which does health check of some websites and extending these lines. So, every line above means another website from a list. (e.g: ["example.com", "google.com", "test.com"]</p>
  
  <p>My script runs every 5minutes and everytime it runs I am adding plus or minus depends on website's availability.</p>
  
  <p>I tried somethings like using <code>readlines</code> method but it returns me <code>['-++++\n', '+----\n', '+++++\n']</code>.
  I am a bit stuck with overriding same file with new value both because I don't know what's best way and because of these new lines characters in the returned list from readlines method.</p>
  
  <p>What would be your suggestion for solving this issue?</p>