libbb: fix regression where 'which' output duplicate slashesHEADmaster

If an element of $PATH had a trailing slash 'which' displayed two
slashes when an executable was found in that directory.

This is a regression caused by upstream commit 49d9e06fb (libbb:
modify find_executable() to not temporarily write to PATH).
Prior to this commit find_executable() used concat_path_file() to
build the path of the executable.  This avoids including duplicate
slashes in its output.  The new code didn't.

Add a test in find_executable() to detect the problem.  It still
fails if there are multiple trailing slashes.  Don't do that.

Adds 48 bytes.

0 files changed, 0 insertions, 0 deletions