[8u20] Request for approval: 8033798 - javap output has unnecessary trailing whitespace

[Alexander Zuev]

Take two:

Bug: https://bugs.openjdk.java.net/browse/JDK-8033798
Fix pushed as: 
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/b5c6e4558b06
Fix applies without an issue to 
http://hg.openjdk.java.net/jdk8u/jdk8u-dev/langtools
Webrev is available at http://cr.openjdk.java.net/~kizune/8033968/webrev
   This fix also eliminates issues:
JDK-8033581: Incorrect comment aligment 
(https://bugs.openjdk.java.net/browse/JDK-8033581)
and
JDK- 8033726: StackMapTable does not unindent properly 
(https://bugs.openjdk.java.net/browse/JDK-8033726)

/Alex