Editorial: add <div algorithm> wrappers to some definitions

Helps with #1526.

Author: dlrobertson

fetch.bs

@@ -1325,6 +1325,7 @@ worked on in <a href=https://github.com/whatwg/fetch/issues/1156>issue #1156</a>
  initially null.
 </ul>
 
+<div algorithm>
 <p>To <dfn export for=body id=concept-body-clone>clone</dfn> a
 <a for=/>body</a> <var>body</var>, run these steps:
 
@@ -1338,13 +1339,17 @@ worked on in <a href=https://github.com/whatwg/fetch/issues/1156>issue #1156</a>
  <a for=body>stream</a> is <var>out2</var> and other members are copied from
  <var>body</var>.
 </ol>
+</div>
 
+<div algorithm>
 <p>To get a <a for=/>byte sequence</a> <var>bytes</var>
 <dfn export for="byte sequence">as a body</dfn>, return the <a for="body with type">body</a> of the
 result of <a for=BodyInit>safely extracting</a> <var>bytes</var>.
+</div>
 
 <hr>
 
+<div algorithm>
 <p>To <dfn export for=body>incrementally read</dfn> a <a for=/>body</a> <var>body</var>, given an
 algorithm <var>processBodyChunk</var>, an algorithm <var>processEndOfBody</var>, an algorithm
 <var>processBodyError</var>, and an optional null, <a for=/>parallel queue</a>, or
@@ -1367,7 +1372,9 @@ must be an algorithm accepting an exception.
  <var>taskDestination</var>, <var>processBodyChunk</var>, <var>processEndOfBody</var>, and
  <var>processBodyError</var>.
 </ol>
+</div>
 
+<div algorithm>
 <p>To perform the <dfn>incrementally-read loop</dfn>, given a {{ReadableStreamDefaultReader}} object
 <var>reader</var>, <a for=/>parallel queue</a> or <a for=/>global object</a>
 <var>taskDestination</var>, algorithm <var>processBodyChunk</var>, algorithm
@@ -1426,7 +1433,9 @@ must be an algorithm accepting an exception.
  <li><p><a for=ReadableStreamDefaultReader>Read a chunk</a> from <var>reader</var> given
  <var>readRequest</var>.
 </ol>
+</div>
 
+<div algorithm>
 <p>To <dfn export for=body>fully read</dfn> a <a for=/>body</a> <var>body</var>, given an algorithm
 <var>processBody</var>, an algorithm <var>processBodyError</var>, and an optional null,
 <a for=/>parallel queue</a>, or <a for=/>global object</a> <var>taskDestination</var> (default
@@ -1450,7 +1459,9 @@ null), run these steps. <var>processBody</var> must be an algorithm accepting a
  <li><p><a for=promise>React</a> to <var>promise</var> with <var>fulfilledSteps</var> and
  <var>rejectedSteps</var>.
 </ol>
+</div>
 
+<div algorithm>
 <p>To <dfn export lt="fully reading body as promise">fully read body as promise</dfn>, given a
 <a for=/>body</a> <var>body</var>, run these steps:
 
@@ -1462,6 +1473,7 @@ null), run these steps. <var>processBody</var> must be an algorithm accepting a
  <li><p>Return the result of <a for=ReadableStreamDefaultReader>reading all bytes</a> from
  <var>reader</var>.
 </ol>
+</div>
 
 <hr>
 
@@ -1471,6 +1483,7 @@ null), run these steps. <var>processBody</var> must be an algorithm accepting a
 
 <hr>
 
+<div algorithm>
 <p>To <dfn export>handle content codings</dfn> given <var>codings</var> and <var>bytes</var>, run
 these steps:
 
@@ -1482,6 +1495,7 @@ these steps:
 </ol>
 <!-- XXX https://github.com/whatwg/fetch/issues/716
          https://github.com/httpwg/http-core/issues/58 -->
+</div>
 
 
 <h4 id=requests>Requests</h4>
@@ -2110,6 +2124,7 @@ or "<code>object</code>".
 
 <hr>
 
+<div algorithm>
 <p>A <a for=/>request</a> <var>request</var> has a
 <dfn for=request id=concept-request-tainted-origin>redirect-tainted origin</dfn> if these steps
 return true:
@@ -2133,7 +2148,9 @@ return true:
 
  <li>Return false.
 </ol>
+</div>
 
+<div algorithm>
 <p><dfn>Serializing a request origin</dfn>, given a <a for=/>request</a> <var>request</var>, is to
 run these steps:
 
@@ -2144,13 +2161,17 @@ run these steps:
  <li><p>Return <var>request</var>'s <a for=request>origin</a>,
  <a lt="ASCII serialization of an origin">serialized</a>.
 </ol>
+</div>
 
+<div algorithm>
 <p><dfn>Byte-serializing a request origin</dfn>, given a <a for=/>request</a> <var>request</var>,
 is to return the result of <a>serializing a request origin</a> with <var>request</var>,
 <a>isomorphic encoded</a>.
+</div>
 
 <hr>
 
+<div algorithm>
 <p>To <dfn export for=request id=concept-request-clone>clone</dfn> a
 <a for=/>request</a> <var>request</var>, run these steps:
 
@@ -2164,6 +2185,7 @@ is to return the result of <a>serializing a request origin</a> with <var>request
 
  <li><p>Return <var>newRequest</var>.
 </ol>
+</div>
 
 <hr>
 
@@ -2199,6 +2221,7 @@ source of security bugs. Please seek security review for features that deal with
 
 <hr>
 
+<div algorithm>
 <p>To <dfn export>serialize a response URL for reporting</dfn>, given a <a for=/>response</a>
 <var>response</var>, run these steps:
 
@@ -2221,7 +2244,9 @@ source of security bugs. Please seek security review for features that deal with
  <li><p>Return the <a lt="URL serializer">serialization</a> of <var>url</var> with
  <a for="URL serializer"><i>exclude fragment</i></a> set to true.
 </ol>
+</div>
 
+<div algorithm>
 <p>To check if <dfn export>Cross-Origin-Embedder-Policy allows credentials</dfn>, given a
 <a for=/>request</a> <var>request</var>, run these steps:
 
@@ -2242,6 +2267,7 @@ source of security bugs. Please seek security review for features that deal with
 
  <li><p>Return false.</p>
 </ol>
+</div>
 
 
 <h4 id=responses>Responses</h4>