[spec] more PR feedback

spec.emu

@@ -64,9 +64,10 @@ contributors:
               1. Return the string-concatenation of 0x005C (REVERSE SOLIDUS) and the string in the “ControlEscape” column of the row whose “Code Point” column contains _c_.
             1. Let _otherPunctuators_ be the string-concatenation of *",-=<>#&!%:;@~'`"* and the code unit 0x0022 (QUOTATION MARK).
             1. Let _toEscape_ be StringToCodePoints(_otherPunctuators_).
-            1. If _toEscape_ contains _c_, _c_ is matched by |WhiteSpace| or |LineTerminator|, or _c_ has the same numeric value as a leading surrogate or trailing surrogate, then
-              1. If the numeric value of _c_ ≤ 0xFF, then
-                1. Let _hex_ be Number::toString(𝔽(_c_), 16).
+            1. If _toEscape_ contains _c_, _c_ is matched by either |WhiteSpace| or |LineTerminator|, or _c_ has the same numeric value as a leading surrogate or trailing surrogate, then
+              1. Let _cNum_ be the numeric value of _c_.
+              1. If _cNum_ ≤ 0xFF, then
+                1. Let _hex_ be Number::toString(𝔽(_cNum_), 16).
                 1. Return the string-concatenation of the code unit 0x005C (REVERSE SOLIDUS), *"x"*, and StringPad(_hex_, 2, *"0"*, ~start~).
               1. Let _escaped_ be the empty String.
               1. Let _codeUnits_ be UTF16EncodeCodePoint(_c_).