Editorial: avoid normative keywords in domintro block

fetch.bs

@@ -5026,7 +5026,7 @@ initially a new {{AbortSignal}} object.
   <var>input</var> is a string, and <var>input</var>'s {{Request/url}} if <var>input</var> is a
   {{Request}} object.
 
-  <p>The optional <var>init</var> argument is an object whose properties can be set as follows:</p>
+  <p>The <var>init</var> argument is an object whose properties can be set as follows:</p>
 
   <dl>
    <dt>{{RequestInit/method}}
@@ -5059,8 +5059,9 @@ initially a new {{AbortSignal}} object.
    <var>request</var>'s {{Request/cache}}.
 
    <dt>{{RequestInit/redirect}}
-   <dd>A string indicating whether or not <var>request</var> should automatically follow redirects,
-   result in an error, or manually follow redirects. Sets <var>request</var>'s {{Request/redirect}}.
+   <dd>A string indicating whether <var>request</var> follows redirects, results in an error upon
+   encountering a redirect, or returns the redirect (in an opaque fashion). Sets
+   <var>request</var>'s {{Request/redirect}}.
 
    <dt>{{RequestInit/integrity}}
    <dd>A cryptographic hash of the resource to be fetched by <var>request</var>. Sets
@@ -5121,8 +5122,7 @@ initially a new {{AbortSignal}} object.
 
  <dt><code><var>request</var> . <a attribute for=Request>integrity</a></code>
  <dd>Returns <var>request</var>'s subresource integrity metadata, which is a cryptographic hash of
- the resource being fetched. Its value may consist of multiple hashes separated by whitespace.
- [[SRI]]
+ the resource being fetched. Its value consists of multiple hashes separated by whitespace. [[SRI]]
 
  <dt><code><var>request</var> . <a attribute for=Request>keepalive</a></code>
  <dd>Returns a boolean indicating whether or not <var>request</var> can outlive the global in which