RFR: JDK-8204674: Inconsistent lambda parameter span

[Jan Lahoda]

Hi,

There are a few cases where the positions for lambda parameters seem to 
be not ideal:

java.util.function.IntBinaryOperator c = (var x, testType) -> 1;

The span for the "var x" variable does not include "var". The span of 
"testType" does not include "testType" after attribution.

The proposed patch tweaks the code to provide more consistent positions.

Bug: https://bugs.openjdk.java.net/browse/JDK-8204674
Webrev: http://cr.openjdk.java.net/~jlahoda/8204674/webrev.00/

How does this look?

Thanks,
     Jan