Fix two errors in the grammar of the steps() function: first, add necessary [] so that the comma applies to both the start and end values; second, add the ? that was intended to indicate the second parameter being optional.

--HG--
extra : rebase_source : d39c0cba4c53e93423f28056996f87a7d9e7dad5

Author: dbaron

css3-animations/Overview.html

@@ -689,10 +689,10 @@ <h3 id="animation-timing-function_tag"><span class=secno>3.4. </span> The
      <td> <em>Value:</em>
 
      <td> ease | linear | ease-in | ease-out | ease-in-out | step-start |
-      step-end | steps(&lt;number&gt;[, start | end ]) |
+      step-end | steps(&lt;number&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out |
-      step-start | step-end | steps(&lt;number&gt;[, start | end ]) |
+      step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;)] ]*
 
@@ -1745,10 +1745,10 @@ <h2 class=no-num id=property-index>Property index</h2>
       href="#animation-timing-function">animation-timing-function</a>
 
      <td>ease | linear | ease-in | ease-out | ease-in-out | step-start |
-      step-end | steps(&lt;number&gt;[, start | end ]) |
+      step-end | steps(&lt;number&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out |
-      step-start | step-end | steps(&lt;number&gt;[, start | end ]) |
+      step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;)] ]*
 

css3-animations/Overview.src.html

@@ -587,7 +587,7 @@ <h3 id="animation-timing-function_tag">
               <em>Value:</em>
             </td>
             <td>
-              ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;number&gt;[, start | end ]) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;number&gt;[, start | end ]) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;)] ]*
+              ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;)] ]*
             </td>
           </tr>
           <tr>

css3-transitions/Overview.html

@@ -543,10 +543,10 @@ <h3 id="transition-timing-function_tag"><span class=secno>2.3. </span> The
      <td> <em>Value:</em>
 
      <td> ease | linear | ease-in | ease-out | ease-in-out | step-start |
-      step-end | steps(&lt;integer&gt;[, start | end ]) |
+      step-end | steps(&lt;integer&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out |
-      step-start | step-end | steps(&lt;number&gt;[, start | end ]) |
+      step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;) ] ]*
 
@@ -1689,10 +1689,10 @@ <h2 class=no-num id=property-index>Property index</h2>
       href="#transition-timing-function">transition-timing-function</a>
 
      <td>ease | linear | ease-in | ease-out | ease-in-out | step-start |
-      step-end | steps(&lt;integer&gt;[, start | end ]) |
+      step-end | steps(&lt;integer&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out |
-      step-start | step-end | steps(&lt;number&gt;[, start | end ]) |
+      step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) |
       cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;,
       &lt;number&gt;) ] ]*
 

css3-transitions/Overview.src.html

@@ -461,7 +461,7 @@ <h3 id="transition-timing-function_tag">
               <em>Value:</em>
             </td>
             <td>
-              ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;integer&gt;[, start | end ]) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;number&gt;[, start | end ]) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;) ] ]*
+              ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;integer&gt;[, [ start | end ] ]?) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;) [, [ ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps(&lt;number&gt;[, [ start | end ] ]?) | cubic-bezier(&lt;number&gt;, &lt;number&gt;, &lt;number&gt;, &lt;number&gt;) ] ]*
             </td>
           </tr>
           <tr>