title: regex pattern not fit well for code like assignment
body: <p>i am trying to use a regular expression to match expression like code assignment
  for example:</p>
  
  <pre><code>"k=++g677"
  "k=--j77"
  "k=++gfrf677frfr"
  </code></pre>
  
  <p>i've tried:</p>
  
  <pre><code>([a-zA-Z])([a-zA-Z]|\d)*[=][+][+]|[-][-]|[*][*]|[\/][\/]([\d]*|([a-zA-Z]([a-zA-Z]\d)*))
  </code></pre>
  
  <p>but it's seemds to match also things like</p>
  
  <pre><code>"k++"
  "k=++@ff"
  </code></pre>
  
  <p>can u help?</p>