Fix: #3681 LineComment alwaysing trimming content

[jlerbsc]

Fixes #3681 .
Trimming line comment only on the right side to give the possibility to the user to control the exact content of comments. This is important when printing several line comments with content that should be aligned.

[jlerbsc]

An exception has occurred in the compiler (10.0.2). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com/) after checking the Bug Database (http://bugs.java.com/) for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1471)
at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.lambda$initPartialTraversalState$0(StreamSpliterators.java:294)
at java.base/java.util.stream.StreamSpliterators$AbstractWrappingSpliterator.fillBuffer(StreamSpliterators.java:206)
at java.base/java.util.stream.StreamSpliterators$AbstractWrappingSpliterator.doAdvance(StreamSpliterators.java:169)
at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.tryAdvance(StreamSpliterators.java:300)
at java.base/java.util.Spliterators$1Adapter.hasNext(Spliterators.java:681)
at java.base/jdk.internal.jrtfs.JrtDirectoryStream$1.hasNext(JrtDirectoryStream.java:81)