Fixed Syntax Summary

Reflect the following modifications to match
the behavior of the actual code.

 - Unicode_Sm and Unicode_So included in opchar
 - Enumerates the characters available in opchar
 - Fixed upper and lower descriptions
 - Removed \u007F from printableChar
 - Fixed an error in Unicode category names(Ml -> Lm)

 Also removed unnecessary comment outs.

scala/bug#12260

Author: magnolia-k

spec/01-lexical-syntax.md

@@ -19,7 +19,7 @@ classes (Unicode general category given in parentheses):
 
 1. Whitespace characters. `\u0020 | \u0009 | \u000D | \u000A`.
 1. Letters, which include lower case letters (`Ll`), upper case letters (`Lu`),
-   title case letters (`Lt`), other letters (`Lo`), modifier letters (`Ml`), 
+   title case letters (`Lt`), other letters (`Lo`), modifier letters (`Lm`), 
    letter numerals (`Nl`) and the two characters `\u0024 ‘$’` and `\u005F ‘_’`.
 1. Digits `‘0’ | … | ‘9’`.
 1. Parentheses `‘(’ | ‘)’ | ‘[’ | ‘]’ | ‘{’ | ‘}’ `.

spec/13-syntax-summary.md

@@ -14,15 +14,20 @@ The lexical syntax of Scala is given by the following grammar in EBNF form:
 
 ```ebnf
 whiteSpace       ::=  ‘\u0020’ | ‘\u0009’ | ‘\u000D’ | ‘\u000A’
-upper            ::=  ‘A’ | … | ‘Z’ | ‘$’ // and any character in Unicode category Lu, Lt or Nl, and any character in Lo and Ml that don't have contributory property Other_Lowercase
-lower            ::=  ‘a’ | … | ‘z’ | ‘_’ // and any character in Unicode category Ll, and and any character in Lo or Ml that has contributory property Other_Lowercase
+upper            ::=  ‘A’ | … | ‘Z’ | ‘$’ and any character in Unicode categories Lu, Lt or Nl,
+                      and any character in Unicode categories Lo and Lm that don't have
+                      contributory property Other_Lowercase
+lower            ::=  ‘a’ | … | ‘z’ | ‘_’ and any character in Unicode category Ll,
+                      and any character in Unicode categories Lo or Lm that has contributory
+                      property Other_Lowercase
 letter           ::=  upper | lower
 digit            ::=  ‘0’ | … | ‘9’
 paren            ::=  ‘(’ | ‘)’ | ‘[’ | ‘]’ | ‘{’ | ‘}’
 delim            ::=  ‘`’ | ‘'’ | ‘"’ | ‘.’ | ‘;’ | ‘,’
-opchar           ::=  // printableChar not matched by (whiteSpace | upper | lower |
-                      // letter | digit | paren | delim | Unicode_Sm | Unicode_So)
-printableChar    ::=  // all characters in [\u0020, \u007F] inclusive
+opchar           ::=  ‘!’ | ‘#’ | ‘%’ | ‘&’ | ‘*’ | ‘+’ | ‘-’ | ‘/’ | ‘:’ |
+                      ‘<’ | ‘=’ | ‘>’ | ‘?’ | ‘@’ | ‘\’ | ‘^’ | ‘|’ | ‘~’
+                      and any character in Unicode categories Sm or So
+printableChar    ::=  all characters in [\u0020, \u007E] inclusive
 UnicodeEscape    ::=  ‘\’ ‘u’ {‘u’} hexDigit hexDigit hexDigit hexDigit
 hexDigit         ::=  ‘0’ | … | ‘9’ | ‘A’ | … | ‘F’ | ‘a’ | … | ‘f’
 charEscapeSeq    ::=  ‘\’ (‘b’ | ‘t’ | ‘n’ | ‘f’ | ‘r’ | ‘"’ | ‘'’ | ‘\’)