Do not let lstree output recursively when a directory whose name is a prefix of the others is given in the path list.

Here is how to reproduce the bug:

git init mkdir prefix && touch prefix/a && git add prefix/a mkdir prefixdir && touch prefixdir/b && git add prefixdir/b git commit -a -m "If -r is not given, ls-tree should not show files in subdirs." git ls-tree --name-only HEAD prefix # works as expected git ls-tree --name-only HEAD prefixdir # works as expected git ls-tree --name-only HEAD prefix prefixdir # shows file, not dir

The output of the last command is 

prefix/a prefixdir

But it should be

prefix prefixdir

The patch fixes the problem.