Editorial: Standardize the spelling of "uppercase" and "lowercase" (t…

…c39#2598)

Matches Unicode:
* https://unicode.org/glossary/
* http://www.unicode.org/reports/tr18/
* https://www.unicode.org/reports/tr31/#Default_Identifier_Syntax
* etc.

spec.html

@@ -798,7 +798,7 @@ <h1>Grammar Notation</h1>
     <h1>Algorithm Conventions</h1>
     <p>The specification often uses a numbered list to specify steps in an algorithm. These algorithms are used to precisely specify the required semantics of ECMAScript language constructs. The algorithms are not intended to imply the use of any specific implementation technique. In practice, there may be more efficient algorithms available to implement a given feature.</p>
     <p>Algorithms may be explicitly parameterized with an ordered, comma-separated sequence of alias names which may be used within the algorithm steps to reference the argument passed in that position. Optional parameters are denoted with surrounding brackets ([ , _name_ ]) and are no different from required parameters within algorithm steps. A rest parameter may appear at the end of a parameter list, denoted with leading ellipsis (, ..._name_). The rest parameter captures all of the arguments provided following the required and optional parameters into a List. If there are no such additional arguments, that List is empty.</p>
-    <p>Algorithm steps may be subdivided into sequential substeps. Substeps are indented and may themselves be further divided into indented substeps. Outline numbering conventions are used to identify substeps with the first level of substeps labelled with lower case alphabetic characters and the second level of substeps labelled with lower case roman numerals. If more than three levels are required these rules repeat with the fourth level using numeric labels. For example:</p>
+    <p>Algorithm steps may be subdivided into sequential substeps. Substeps are indented and may themselves be further divided into indented substeps. Outline numbering conventions are used to identify substeps with the first level of substeps labelled with lowercase alphabetic characters and the second level of substeps labelled with lowercase roman numerals. If more than three levels are required these rules repeat with the fourth level using numeric labels. For example:</p>
     <emu-alg example>
       1. Top-level step
         1. Substep.
@@ -35665,7 +35665,7 @@ <h1>Runtime Semantics: CompileToCharSet</h1>
           <p>|ClassRanges| can expand into a single |ClassAtom| and/or ranges of two |ClassAtom| separated by dashes. In the latter case the |ClassRanges| includes all characters between the first |ClassAtom| and the second |ClassAtom|, inclusive; an error occurs if either |ClassAtom| does not represent a single character (for example, if one is \w) or if the first |ClassAtom|'s character value is greater than the second |ClassAtom|'s character value.</p>
         </emu-note>
         <emu-note>
-          <p>Even if the pattern ignores case, the case of the two ends of a range is significant in determining which characters belong to the range. Thus, for example, the pattern `/[E-F]/i` matches only the letters `E`, `F`, `e`, and `f`, while the pattern `/[E-f]/i` matches all upper and lower-case letters in the Unicode Basic Latin block as well as the symbols `[`, `\\`, `]`, `^`, `_`, and <code>`</code>.</p>
+          <p>Even if the pattern ignores case, the case of the two ends of a range is significant in determining which characters belong to the range. Thus, for example, the pattern `/[E-F]/i` matches only the letters `E`, `F`, `e`, and `f`, while the pattern `/[E-f]/i` matches all uppercase and lowercase letters in the Unicode Basic Latin block as well as the symbols `[`, `\\`, `]`, `^`, `_`, and <code>`</code>.</p>
         </emu-note>
         <emu-note>
           <p>A `-` character can be treated literally or it can denote a range. It is treated literally if it is the first or last character of |ClassRanges|, the beginning or end limit of a range specification, or immediately follows a range specification.</p>