Editorial: Misc Editorial re recent commits (#1023)

* Editorial: fix 2 typos from recent commit

* Editorial: Add blank lines in multi-prodn <emu-grammar>s

* Editorial: Un-expand a needlessly expanded prodn

* Editorial: Change [U] to <sub>[U]</sub>

... for consistency with similar wording elsewhere.

* Editorial: "code unit value" -> "numeric value"

(only one occurrence)
Commit bfecd4f eliminated the phrase "code unit value" in algorithms.

* Editorial: Change "the code point value of the SV of |HexEscapeSequence|"

... to "the numeric value of the code unit that is the SV of |HexEscapeSequence|".

The SV of |HexEscapeSequence| is a single code unit,
and it doesn't make much sense to ask for
the code point value of a code unit.

spec.html

@@ -7588,7 +7588,7 @@ <h1>FunctionDeclarationInstantiation ( _func_, _argumentsList_ )</h1>
           1. Let _parameterBindings_ be a new List of _parameterNames_ with `"arguments"` appended.
         1. Else,
           1. Let _parameterBindings_ be _parameterNames_.
-        1. Let _iteratorRecord_ be CreateListIterator(_argumentsList_).
+        1. Let _iteratorRecord_ be CreateListIteratorRecord(_argumentsList_).
         1. If _hasDuplicates_ is *true*, then
           1. Perform ? IteratorBindingInitialization for _formals_ with _iteratorRecord_ and *undefined* as arguments.
         1. Else,
@@ -19413,7 +19413,7 @@ <h1>Runtime Semantics: Evaluation</h1>
               1. Set _received_ to GeneratorYield(_innerResult_).
             1. Else,
               1. NOTE: If _iterator_ does not have a `throw` method, this throw is going to terminate the `yield*` loop. But first we need to give _iterator_ a chance to clean up.
-              1. Perform ? IteratorClose(_iteratorResult_, Completion{[[Type]]: ~normal~, [[Value]]: ~empty~, [[Target]]: ~empty~}).
+              1. Perform ? IteratorClose(_iteratorRecord_, Completion{[[Type]]: ~normal~, [[Value]]: ~empty~, [[Target]]: ~empty~}).
               1. NOTE: The next step throws a *TypeError* to indicate that there was a `yield*` protocol violation: _iterator_ does not have a `throw` method.
               1. Throw a *TypeError* exception.
           1. Else,
@@ -29246,9 +29246,13 @@ <h1>Static Semantics: CapturingGroupNumber</h1>
         <h1>Static Semantics: IsCharacterClass</h1>
         <emu-grammar>
           ClassAtom :: `-`
+
           ClassAtomNoDash :: SourceCharacter but not one of `\` or `]` or `-`
+
           ClassEscape :: `b`
+
           ClassEscape :: `-`
+
           ClassEscape :: CharacterEscape
         </emu-grammar>
         <emu-alg>
@@ -29414,7 +29418,7 @@ <h1>Static Semantics: CharacterValue</h1>
         </emu-note>
         <emu-grammar>CharacterEscape :: HexEscapeSequence</emu-grammar>
         <emu-alg>
-          1. Return the code point value of the SV of |HexEscapeSequence|.
+          1. Return the numeric value of the code unit that is the SV of |HexEscapeSequence|.
         </emu-alg>
         <emu-grammar>RegExpUnicodeEscapeSequence :: `u` LeadSurrogate `\u` TrailSurrogate</emu-grammar>
         <emu-alg>
@@ -29445,7 +29449,9 @@ <h1>Static Semantics: CharacterValue</h1>
         </emu-alg>
         <emu-grammar>
           LeadSurrogate :: Hex4Digits
+
           TrailSurrogate :: Hex4Digits
+
           NonSurrogate :: Hex4Digits
         </emu-grammar>
         <emu-alg>
@@ -30216,11 +30222,7 @@ <h1>CharacterEscape</h1>
       <emu-clause id="sec-decimalescape">
         <h1>DecimalEscape</h1>
         <p>The |DecimalEscape| productions evaluate as follows:</p>
-        <emu-grammar>
-          DecimalEscape ::
-            NonZeroDigit
-            NonZeroDigit DecimalDigits
-        </emu-grammar>
+        <emu-grammar>DecimalEscape :: NonZeroDigit DecimalDigits?</emu-grammar>
         <emu-alg>
           1. Return the CapturingGroupNumber of this |DecimalEscape|.
         </emu-alg>
@@ -30388,7 +30390,9 @@ <h1>ClassEscape</h1>
         <p>The |ClassEscape| productions evaluate as follows:</p>
         <emu-grammar>
           ClassEscape :: `b`
+
           ClassEscape :: `-`
+
           ClassEscape :: CharacterEscape
         </emu-grammar>
         <emu-alg>
@@ -39145,13 +39149,13 @@ <h1>Static Semantics: Early Errors</h1>
         <emu-grammar>NonemptyClassRanges :: ClassAtom `-` ClassAtom ClassRanges</emu-grammar>
         <ul>
           <li>
-            It is a Syntax Error if IsCharacterClass of the first |ClassAtom| is *true* or IsCharacterClass of the second |ClassAtom| is *true* <ins>and this production has a [U] parameter</ins>.
+            It is a Syntax Error if IsCharacterClass of the first |ClassAtom| is *true* or IsCharacterClass of the second |ClassAtom| is *true* <ins>and this production has a <sub>[U]</sub> parameter</ins>.
           </li>
         </ul>
         <emu-grammar>NonemptyClassRangesNoDash :: ClassAtomNoDash `-` ClassAtom ClassRanges</emu-grammar>
         <ul>
           <li>
-            It is a Syntax Error if IsCharacterClass of |ClassAtomNoDash| is *true* or IsCharacterClass of |ClassAtom| is *true* <ins>and this production has a [U] parameter</ins>.
+            It is a Syntax Error if IsCharacterClass of |ClassAtomNoDash| is *true* or IsCharacterClass of |ClassAtom| is *true* <ins>and this production has a <sub>[U]</sub> parameter</ins>.
           </li>
         </ul>
       </emu-annex>
@@ -39185,7 +39189,7 @@ <h1>Static Semantics: CharacterValue</h1>
         <emu-grammar>CharacterEscape :: LegacyOctalEscapeSequence</emu-grammar>
         <emu-alg>
           1. Evaluate the SV of the |LegacyOctalEscapeSequence| (see <emu-xref href="#sec-additional-syntax-string-literals"></emu-xref>) to obtain a code unit _cu_.
-          1. Return the code unit value of _cu_.
+          1. Return the numeric value of _cu_.
         </emu-alg>
       </emu-annex>