address review comments

Author: svgeesus

figures/serializing-and-filtering-16bit-scanline.svg

@@ -2557,7 +2557,6 @@ <h2>Filtering</h2>
       </figure>
 
       <figure id="serializing-and-filtering-scanline-16">
-        <!-- Maintain a fragment named "figure49" to preserve incoming links to it -->
          <object id="figure49b" data="figures/serializing-and-filtering-16bit-scanline.svg" type="image/svg+xml">
         </object>
         <figcaption>
@@ -2700,6 +2699,7 @@ <h2>Filter types for filter method 0</h2>
       </table>
 
       <figure id="filter-byte-positions">
+        <!-- Maintain a fragment named "figure72" to preserve incoming links to it -->
         <object id="figure72" data="figures/filter-bytes.svg" type="image/svg+xml" style="width: 12.5vw">
         </object>
         <figcaption>
@@ -2708,7 +2708,7 @@ <h2>Filter types for filter method 0</h2>
       </figure>
 
       <figure id="filter-byte-positions-16">
-        <object id="figure72" data="figures/filter-bytes-16bit.svg" type="image/svg+xml" style="width: 22.5vw">
+        <object id="figure72b" data="figures/filter-bytes-16bit.svg" type="image/svg+xml" style="width: 22.5vw">
         </object>
         <figcaption>
           Positions of filter bytes a, b and c relative to x, for 16 bits per component