Edit 3.3.2 Parse metadata in more detail v4

Author: baek9

index.bs

@@ -357,21 +357,21 @@ spec: SHA2; urlPrefix: http://csrc.nist.gov/publications/fips/fips180-4/fips-180
       |metadata| on spaces:
       1.  Let |hash-with-opt-token-list| be the result of
           <a lt="strictly split">splitting</a> |item| on U+003F (?).
-      2.  Let |hash-expression| be the |hash-with-opt-token-list|[0].
+      2.  Let |hash-expression| be |hash-with-opt-token-list|[0].
       3.  Let |base64-value| be the empty string.
       4.  Let |hash-expr-token-list| be the result of
           <a lt="strictly split">splitting</a> |hash-expression| on U+002D (-).
-      5.  Let |algorithm| be the |hash-expr-token-list|[0].
+      5.  Let |algorithm| be |hash-expr-token-list|[0].
       6.  If |hash-expr-token-list|[1] <a for=list>exists</a>, set
-          |base64-value| be the |hash-expr-token-list|[1].
+          |base64-value| to |hash-expr-token-list|[1].
       7.  If |algorithm| is not a hash function recognized by the user agent,
-           [=continue=] the next |item|.
+           [=continue=].
       8. Let |metadata| be the ordered map  «["alg" → |algorithm|,
          "val" → |base64-value|]».
 
-         Note: Since no `options` are not defined(see the
-         [[#integrity-metadata-description]]), corresponding entry is not set in
-         |metadata|. If `options` are defined in a future version of the spec,
+         Note: Since no `options` are defined (see the
+         [[#integrity-metadata-description]]), a corresponding entry is not set
+         in |metadata|. If `options` are defined in a future version,
          |hash-with-opt-token-list|[1] can be utilized as `options`.
 
       9. <a for=list>Append</a> |metadata| to |result|.
@@ -400,14 +400,12 @@ spec: SHA2; urlPrefix: http://csrc.nist.gov/publications/fips/fips180-4/fips-180
 
   1.  Let |parsedMetadata| be the result of
       <a href="#parse-metadata">parsing |metadataList|</a>.
-  2.  If |parsedMetadata| is the empty set, return `true`.
+  2.  If |parsedMetadata| [=set/is empty=] set, return `true`.
   3.  Let |metadata| be the result of <a href="#get-the-strongest-metadata">
       getting the strongest metadata from |parsedMetadata|</a>.
   4.  For each |item| in |metadata|:
-      1.  Let |algorithm| be the |alg| component of
-          |item|.
-      2.  Let |expectedValue| be the |val| component of
-          |item|.
+      1.  Let |algorithm| be the |item|["alg"].
+      2.  Let |expectedValue| be the |item|["val"].
       3.  Let |actualValue| be the result of <a
           href="#apply-algorithm-to-response">applying |algorithm| to |bytes|
           </a>.