SVN MOVE don't perform a delete in some case

Hi !

When i refer to the svn-book 1.6, it's written that a svn move perform
first a svn copy and then a svn delete.
But in some case, the command never perform a svn delete.
To test, i have written a pre-commit hook who deny deletion of a branch
catching a "D ReposPath" action.

*Test 1 : Try to rename a directory BRANCHE to BRANCHE_1*

*Command :*
svn move --message "Rename BRANCHE to BRANCHE_1"
http://tetris.agora.msanet:16060/svn/METIER/y78amodifier/branches/BRANCHE
http://tetris.agora.msanet:16060/svn/METIER/y78amodifier/branches/BRANCHE_1

*Hook params :*
D y78amodifier/branches/BRANCHE/

*Command result : *
A repository hook failed
svn: Commit blocked by pre-commit hook (exit code 1) with output:
It's not allowed to rename or delete a branch.

*Test 2 : Try to rename a directory BRANCHE to BRANCH*

*Command :*
svn move --message "Rename BRANCHE to BR"
http://tetris.agora.msanet:16060/svn/METIER/y78amodifier/branches/BRANCHE
http://tetris.agora.msanet:16060/svn/METIER/y78amodifier/branches/BR

*Hook params :*
A y78amodifier/branches/BRANCH/

*Command result : *
Commit done without error.

Do you think it's a bug ?

Thank you,
Have a great day.

Yann

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