Updating Angular version

third_party/pkg/angular/lib/core/parser/characters.dart

 library angular.core.parser.characters;
 
 const int $EOF       = 0;
 const int $TAB       = 9;
 const int $LF        = 10;
 const int $VTAB      = 11;
 const int $FF        = 12;
 const int $CR        = 13;
 const int $SPACE     = 32;
 const int $BANG      = 33;
@@ skipping 80 matching lines @@
 const int $y = 121;
 const int $z = 122;
 
 const int $LBRACE = 123;
 const int $BAR    = 124;
 const int $RBRACE = 125;
 const int $TILDE  = 126;
 const int $NBSP   = 160;
 
 bool isWhitespace(int code) {
-  return (code == $SPACE)
-      || (code == $CR)
-      || (code == $LF)
-      || (code == $NBSP)
-      || (code == $TAB)
-      || (code == $VTAB);
+  return (code >= $TAB && code <= $SPACE) || (code == $NBSP);
 }
 
 bool isIdentifierStart(int code) {
   return ($a <= code && code <= $z)
       || ($A <= code && code <= $Z)
       || (code == $_)
       || (code == $$);
 }
 
 bool isIdentifierPart(int code) {
@@ skipping 10 matching lines @@
 
 bool isExponentStart(int code) {
   return (code == $e || code == $E);
 }
 
 bool isExponentSign(int code) {
   return (code == $MINUS || code == $PLUS);
 }
 
 int unescape(int code) {
-  Map<int, int> escapes = const {
-      $n: $LF,
-      $f: $FF,
-      $r: $CR,
-      $t: $TAB,
-      $v: $VTAB };
-  int mapped = escapes[code];
-  return (mapped == null) ? code : mapped;
+  switch(code) {
+    case $n: return $LF;
+    case $f: return $FF;
+    case $r: return $CR;
+    case $t: return $TAB;
+    case $v: return $VTAB;
+    default: return code;
+  }
 }