Update docs

Author: mrmrs

docs/typography/font-family/index.html

@@ -57,7 +57,7 @@
       <header class="ph3 ph5-ns w-100 pv3 mb4 mb5-ns bt bb b--black-10 overflow-auto">
         <div class="nowrap mw9 center">
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/scale/" title="Type">Type Scale</a>
-        <a class="f6 fw6 dim link black pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/measure/" title="Measure">Measure</a>
+        <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/measure/" title="Measure">Measure</a>
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/line-height/" title="Line Height">Line Height / Leading</a>
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/tracking/" title="Tracking">Tracking</a>
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/font-weight/" title="Font Weights">Font Weights</a>
@@ -67,7 +67,7 @@
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/text-transform" title="Text Transform">Text Transform</a>
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/text-decoration" title="Text Decoration">Text Decoration</a>
         <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/white-space" title="White Space">White Space</a>
-        <a class="f6 fw6 dim link black-70 pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/font-family" title="Font Families">Font Families</a>
+        <a class="f6 fw6 dim link black pb2-ns mr2 mr3-m mr4-l" href="/docs/typography/font-family" title="Font Families">Font Families</a>
         </div>
       </header>
       <article class="pa3 ph5-ns">

docs/typography/line-height/index.html

@@ -79,16 +79,26 @@ <h3 class="f6 ttu tracked mt0">Line Height</h3>
            vertical distance from the baseline of one line to the baseline of the next. Also
            called <b class="fw6">leading</b>.
         </p>
-        <p class="measure f4 lh-copy">
-          There are generally 3 to 4 different line-heights you will need when setting type.
-          Line-height affects how easy it is to read a piece of text, so having a well constructed
-          set of values can help make your text a little easier to digest.
+        <blockquote class="mh0">
+          <p class="measure lh-copy">
+            "Many people with cognitive disabilities have trouble tracking lines
+             of text when a block of text is single spaced. Providing spacing between 1.5 to
+             2 allows them to start a new line more easily once they have finished the
+             previous one."  
+          </p>
+          <cite><a href="https://www.w3.org/TR/WCAG20-TECHS/C21.html" class="link underline-hover black-70">- WCAG 2.0 Compliance Techniques</a></cite>
+        </blockquote>
+        <p class="measure lh-copy">
+          Line-height affects how easy it is to read a piece of text, so having
+          a well constructed set of values can help make your text easier to read,
+          increasing the chances that people will read it. Tachyons provides
+          classes to set text at three common line-height values. 1.5 for body copy, 1.25 for titles, 
+          and 1 for text that doesn't wrap. 
         </p>
       </article>
       <div class="ph3 ph5-ns pt4 pb5">
         <h3 class="f5 mb4 pb2 bb">Examples</h3>
-        <h4 class="f6 ttu tracked fw6 mv0">6rem/96px at 30em</h4>
-        <h4 class="f5 fw4 mt5">No applied line-height (default)</h4>
+        <h4 class="f5 fw4">No applied line-height (default)</h4>
         <p class="measure">
           Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod
           tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At