title: Remove newline character from first line of NSString
body: <p>How can I remove the first <strong>\n</strong> character from an NSString?</p>
  
  <p>Edit: Just to clarify, what I would like to do is: 
  If the first line of the string contains a \n character, delete it else do nothing.</p>
  
  <p>ie: If the string is like this:</p>
  
  <pre><code>@"\nhello, this is the first line\nthis is the second line"
  </code></pre>
  
  <p>and opposed to a string that does not contain a newline in the first line:</p>
  
  <pre><code>@"hello, this is the first line\nthis is the second line."
  </code></pre>
  
  <p>I hope that makes it more clear.</p>