Write more tests and reorganize a bit to follow the grammar.

Author: fred-wang

base-commands.txt

@@ -50,14 +50,14 @@
 "\\cellopts" return "CELLOPTS";
 "\\check" { yytext = "\u02C7"; return "ACCENTNS"; }
 "\\choose" return "TEXCHOOSE";
-"\\closure" { yytext = "\u02C7"; return "ACCENT"; }
+"\\closure" { yytext = "\u00AF"; return "ACCENT"; }
 "\\colalign" { this.begin("TEXTARG"); return "COLALIGN"; }
 "\\collayout" { this.pushState("TEXTARG"); return "COLLAYOUT";}
 "\\collines" { this.pushState("TEXTARG"); return "COLLINES"; }
 "\\color" { this.pushState("TEXTARG"); return "COLOR"; }
 "\\colspan" { this.begin("TEXTARG"); return "COLSPAN"; }
 "\\ddddot" { yytext = "\u20DC"; return "ACCENT"; }
-"\\dddot" { yytext = "\u30DB"; return "ACCENT"; }
+"\\dddot" { yytext = "\u20DB"; return "ACCENT"; }
 "\\ddot" { yytext = "\u0308"; return "ACCENT"; }
 "\\displaystyle" return "DISPLAYSTYLE";
 "\\dot" { yytext = "\u02D9"; return "ACCENT"; }
@@ -116,7 +116,7 @@
 "\\operatorname" { this.begin("TEXTARG"); return "OPERATORNAME"; }
 "\\over" return "TEXOVER";
 "\\overbrace" return "OVERBRACE";
-"\\overline" { yytext = "\u02C7"; return "ACCENT"; }
+"\\overline" { yytext = "\u00AF"; return "ACCENT"; }
 "\\overset" return "OVERSET";
 "\\padding" { this.pushState("TEXTARG"); return "PADDING"; }
 "\\phantom" return "PHANTOM";