Fix message tests

V8 3.4.12.1 changed exception log format.

3.14.10:
node.js:189
        throw e; // process.nextTick error, or 'error' event on first tick
        ^

3.4.12.1:
node.js:189
        throw e; // process.nextTick error, or 'error' event on first tick
              ^

The caret was moved.