anchor.diff:  <div class="bg-gray mb-6 border-bottom jumbotron px-3">
     <div class="container-md">
       <h2 class="alt-h1 text-center text-blue">Make a contribution</h2>
  -    <p class="alt-lead text-center text-gray">Open source software is made by people just like you. Take some time one day every week and make your contribution.
  +    <p class="alt-lead text-center text-gray">Open source is made by people just like you. Once a week, contribute back to the software you use and love.
     </div>
   </div>
   
  
positive.code:         <div class="float-left mr-4 float-md-none mr-md-0 mb-md-3"><img src="https://assets-cdn.github.com/images/modules/site/icons/opensource-ico-grow.svg?sn" alt="" aria-hidden></div>
          <div class="overflow-hidden">
            <h3 class="alt-h4 mb-2">Grow your skills and help&nbsp;others</h3>
            <p class="alt-text-small text-gray">Whatever your skill level, working on open source software is a great way to learn new&nbsp;things and meet people with similar interests all while improving your public reputation.</p>
          </div>
        </div>
      </div>
  
negative.code:   <h2 class="alt-h2 text-center">Invest in your future</h2>
  
    <p class="alt-lead text-gray col-md-10 mx-auto text-center mb-6">
      Open source software is built in public. Sharpen your skills and be part of something big.
    </p>
    <div class="clearfix gut-lg">
      <div class="float-left col-md-4">
  