anchor.diff:  
   === Determining if a file has a roll file suffix
   
  -The method `FileUtil::hasQueueSuffix` can be used to determine if a file has a roll file suffix (i.e. `.cq4`):
  +The method `FileUtil::hasQueueSuffix` can be used to determine if a file has a roll file suffix (i.e. ".cq4"):
   
   [source,java]
   ----
  
positive.code: 
  === Determining the state of a file
  
  The method `FileUtil.state` can be used to determine the current state of a file:
  
  [source,java]
  ----
  
negative.code: }
  ----
  
  NOTE: The method above is only supported on Linux/BSD systems and not Windows.
  
  === Removable roll files
  
  After some time, there might be lingering queue files that are no longer used. Identifying these files is non-trivial as there might be tailers that are still on older roll files.
  
  For example, appenders may be on roll file 10, tailer A on file 3 and tailer B on file 5. In this case, it is only safe to remove the rolls 0, 1 and 2. In particular, roll 4 must not be removed or else tailer A will eventually fail.
  
  The removal candidates can be identified by invoking the `FileUtil::removableRollFileCandidates` method as described hereunder:
  
  