Editorial: Change remaining _c_ to _cp_ in EncodeForRegExpEscape (tc39#3546)

(Quick fix re PR tc39#3382)

Author: jmdyck

spec.html

@@ -38562,14 +38562,14 @@ <h1>
           </h1>
           <dl class="header">
             <dt>description</dt>
-            <dd>It returns a String representing a |Pattern| for matching _c_. If _c_ is white space or an ASCII punctuator, the returned value is an escape sequence. Otherwise, the returned value is a String representation of _c_ itself.</dd>
+            <dd>It returns a String representing a |Pattern| for matching _cp_. If _cp_ is white space or an ASCII punctuator, the returned value is an escape sequence. Otherwise, the returned value is a String representation of _cp_ itself.</dd>
           </dl>
 
           <emu-alg>
             1. If _cp_ is matched by |SyntaxCharacter| or _cp_ is U+002F (SOLIDUS), then
               1. Return the string-concatenation of 0x005C (REVERSE SOLIDUS) and UTF16EncodeCodePoint(_cp_).
             1. Else if _cp_ is a code point listed in the “Code Point” column of <emu-xref href="#table-controlescape-code-point-values"></emu-xref>, then
-              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. Return the string-concatenation of 0x005C (REVERSE SOLIDUS) and the string in the “ControlEscape” column of the row whose “Code Point” column contains _cp_.
             1. Let _otherPunctuators_ be the string-concatenation of *",-=&lt;>#&amp;!%:;@~'`"* and the code unit 0x0022 (QUOTATION MARK).
             1. Let _toEscape_ be StringToCodePoints(_otherPunctuators_).
             1. If _toEscape_ contains _cp_, _cp_ is matched by either |WhiteSpace| or |LineTerminator|, or _cp_ has the same numeric value as a leading surrogate or trailing surrogate, then