[spec] more PR feedback

spec.emu

@@ -31,7 +31,7 @@ contributors:
           1. Let _escaped_ be the empty String.
           1. Let _cpList_ be StringToCodePoints(_S_).
           1. For each code point _c_ of _cpList_, do
-            1. If _escaped_ is the empty String, and _c_ is matched by |DecimalDigit| or |AsciiLetter|, then
+            1. If _escaped_ is the empty String and _c_ is matched by either |DecimalDigit| or |AsciiLetter|, then
               1. NOTE: Escaping a leading digit ensures that output corresponds with pattern text which may be used after a `\0` character escape or a |DecimalEscape| such as `\1` and still match _S_ rather than be interpreted as an extension of the preceding escape sequence. Escaping a leading ASCII letter does the same for the context after `\c`.
               1. Let _numericValue_ be the numeric value of _c_.
               1. Let _hex_ be Number::toString(𝔽(_numericValue_), 16).