Fixed bug in RepositorySorter

[cantorio]

In "SVN Repositories" view if branch name contains more than 6 digits in a row, in some circumstances exception occurres when trying to open a tree:

java.lang.IllegalArgumentException: Comparison method violates its general contract!
Workaround for comparator violation:
Set system property -Djava.util.Arrays.useLegacyMergeSort=true
this: org.tigris.subversion.subclipse.ui.repository.RepositorySorter
comparator: java.text.RuleBasedCollator

Detailed stacktrace is:
java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.base/java.util.TimSort.mergeHi(TimSort.java:903)
at java.base/java.util.TimSort.mergeAt(TimSort.java:520)
at java.base/java.util.TimSort.mergeCollapse(TimSort.java:448)
at java.base/java.util.TimSort.sort(TimSort.java:245)
at java.base/java.util.Arrays.sort(Arrays.java:1233)
at org.eclipse.jface.viewers.ViewerComparator.sort(ViewerComparator.java:206)

I provided a solution and also added system property to be able to disable complex "revision" comparison of branch names in eclipse.ini.
It would be great if someone check this fix and merge into master branch.

[markphip]

I provided a solution and also added system property to be able to disable complex "revision" comparison of branch names in eclipse.ini.

Given that you provided a solution, what was the reason behind the second part of this change?

[cantorio]

Given that you provided a solution, what was the reason behind the second part of this change?

Sorry for the late response. Actually, the first thing i did when i faced a given issue and didn't want to check all comparison logic, was disabling it with a flag and "patching" a jar inside my eclipse installation. Only after I had some free time to actually dive into that logic, I provided a fail-safe solution, but didn't remove a flag, as logic still remains a bit tricky in my opinion.
P.S. Thanks for merging into master branch.