Remove trailing whitespace (#125)

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@@ -131,7 +131,7 @@
 candidate additions to published recommendations.
 Others can read this document to understand how we are informing
 our design process with ethical considerations.
-  
+
 For actionable guidance applicable to spec editors, site authors,
 and others designing and building parts of the web platform,
 see the [[[Design-Principles]]], [[[security-privacy-questionnaire]]],
@@ -258,12 +258,12 @@ <h3 id="verify" data-export="" data-dfn-type="dfn">
   </h3>
   <p>
 Society relies on the integrity of public information.
-We have a responsibility to build web technologies to counter misinformation 
+We have a responsibility to build web technologies to counter misinformation
 and to maintain the integrity of information for public good.
 The public needs verifiable source and context information to recognize
 trustworthy web publishers and content.
-The concept of origin and 
-<a href="https://www.w3.org/2001/tag/doc/distributed-content/">its relationship with information sources</a> 
+The concept of origin and
+<a href="https://www.w3.org/2001/tag/doc/distributed-content/">its relationship with information sources</a>
 are core to the web's security model.
   </p>
 </section>
@@ -295,7 +295,7 @@ <h3 id="sustainable" data-export="" data-dfn-type="dfn">
   <p>
 Web technologies may have overall positive environmental impacts
 as well as negative impacts,
-and these can change over time and vary geographically as 
+and these can change over time and vary geographically as
 both web and environmental technologies develop.
 We will endeavor not to do further harm to the environment
 when we introduce new technologies to the web and keep in mind
@@ -358,11 +358,11 @@ <h3 id="render" data-export="" data-dfn-type="dfn">
 <section class="appendix">
   <h2>Acknowlegements</h2>
   <p>
-The TAG would like to thank the following people for their help, input, and feedback 
-during the conceptualization and ongoing development of this document: 
+The TAG would like to thank the following people for their help, input, and feedback
+during the conceptualization and ongoing development of this document:
 Tantek Çelik (Mozilla),
-Oluwatomisin Niyi-Awosusi, 
-Joanna J. Bryson (Professor of Ethics and Technology, Centre for Digital Governance, Hertie School), 
+Oluwatomisin Niyi-Awosusi,
+Joanna J. Bryson (Professor of Ethics and Technology, Centre for Digital Governance, Hertie School),
 Wendy Seltzer.
   </p>
 </section>