RFR: 8040332 : (s/URGENT) fixpath must q

[Mike Duigou]

Hello all;

The recent change to fixpath in JDK-8039411 (https://bugs.openjdk.java.net/browse/JDK-8039411) (http://hg.openjdk.java.net/jdk9/dev/rev/45183b39d300) introduced a regression for zero length arguments.

This changes forces quoting of zero length arguments. It also contains fixes to a spelling error and cleans up some inconsistent formatting.

https://bugs.openjdk.java.net/browse/JDK-8040332
http://cr.openjdk.java.net/~mduigou/JDK-8040332/0/webrev/

Mike