Fix number scanning

tests/language/number_identifier_test.dart

Index: tests/language/number_identifier_test.dart
===================================================================
--- tests/language/number_identifier_test.dart	(revision 27197)
+++ tests/language/number_identifier_test.dart	(working copy)
@@ -14,7 +14,7 @@
   Expect.isTrue(-0x10is int);
   // "a" will be part of hex literal, the following "s" is an error.
   0x10as int;  /// 01: compile-time error
-  0x;  /// 04: compile-time error
+  0x;          /// 04: compile-time error
 
   // Double literals.
   Expect.isTrue(2.0is double);
@@ -29,9 +29,8 @@
   Expect.equals(1e-2, 1e-2as double);
   Expect.isTrue(1e+2is double);
   Expect.equals(1e+2, 1e+2as double);
-  Expect.throws(() => 1.e+2,                                 /// 05: ok
-                (e) => e is NoSuchMethodError &&             /// 05: continued
-                       e.memberName == const Symbol("e"));   /// 05: continued
+  Expect.throws(() => 1.e+2,                       /// 05: ok
+                (e) => e is NoSuchMethodError);    /// 05: continued
   1e;  /// 02: compile-time error
   1x;  /// 03: compile-time error
 }