[8u20] Request for approval: 8035364 - An extra space in the comments of constant pool entries

[Alexander Zuev]

Please approve yet another backport from jdk9.

Bug: https://bugs.openjdk.java.net/browse/JDK-8035364
Fix pushed as: 
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/1aabe91e4a4b
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/8035370/webrev.00

/Alex