Make string juxtaposition combine properly with string interpolations.

tests/language/language-leg.status

Index: tests/language/language-leg.status
diff --git a/tests/language/language-leg.status b/tests/language/language-leg.status
index b50fa954f99eab870bdacad55d0eaef450d9f3fd..92b79030cfaf1790f66cbc702cc1630c12c9acf9 100644
--- a/tests/language/language-leg.status
+++ b/tests/language/language-leg.status
@@ -7,8 +7,7 @@
 
 
 [ $component == leg ]
-AdjacentConstStringLiteralsTest: Crash # Issue 2110
-AdjacentStringLiteralsTest: Crash # Cannot call 'get:dartString' on "${s}".
+AdjacentConstStringLiteralsTest: Pass, Fail # Not recognizing 'const' constructor call.

[ngeoffray, 2012/03/14 12:29:58]

So is the Pass,Fail due to an assert? Why not changing the assert to an
internalError?

[Lasse Reichstein Nielsen, 2012/03/14 13:04:49]

The problem is that we pass, even though we shouldn't.
It tests that  
  static final s = "constant string";
   ...   const SomeClass("$s")
works, which should only be the case if we recognized compile-time constant
interpolations.
But it works because we don't implement "const" but convert it to "new" instead,
so the compile-time constant requirement on the argument isn't checked.

I'll change it to just Pass.

 Constructor6Test: Crash
 CompileTimeConstant8Test: Fail # We don't take the generic type into account yet.
 CompileTimeConstantBTest: Fail # We don't handle constant map literals with __proto__ key yet.