[Bug-stow] 'dot-' prefix and preexisiting directories

[Black Lamb]

Stow version: 2.3.1

Perl version: 5.30.0

System information: Linux archlinux 5.2.4-arch1-1-ARCH #1 SMP PREEMPT Sun Jul 28 10:52:46 UTC 2019 x86_64 GNU/Linux

Bug Description: stow fails to link files within dot-directories when using 'dot-' prefix with the --dotfile option if the dot-directory already exists in the target directory

Commands (assume no .stowrc):

$ cd ~

$ mkdir .foo

$ mkdir dotfiles

$ cd dotfiles

$ mkdir -p foobar/dot-foo

$ touch foobar/dot-foo/bar

$ stow --dotfiles --verbose=3 foobar  # exit code 2

stow dir is /home/$USER/dotfiles

stow dir path relative to target /home/$USER is dotfiles

cwd now /home/$USER

cwd restored to /home/$USER/dotfiles

cwd now /home/$USER

Planning stow of package foobar...

Stowing contents of dotfiles/foobar (cwd=/home/$USER)

Stowing dotfiles / foobar / .foo

Stowing contents of dotfiles/foobar/.foo (cwd=/home/$USER)

stow: ERROR: stow_contents() called with non-directory path: dotfiles/foobar/.foo

$ mv foobar/{dot-foo,.foo}

$ stow --verbose=3 foobar  # works when not using 'dot-' preprocessing

stow dir is /home/$USER/dotfiles

stow dir path relative to target /home/$USER is dotfiles

cwd now /home/$USER

cwd restored to /home/$USER/dotfiles

cwd now /home/$USER

Planning stow of package foobar...

Stowing contents of dotfiles/foobar (cwd=/home/$USER)

Stowing dotfiles / foobar / .foo

Stowing contents of dotfiles/foobar/.foo (cwd=/home/$USER)

Stowing dotfiles / foobar / .foo/bar

LINK: .foo/bar => ../dotfiles/foobar/.foo/bar

Planning stow of package foobar... done

cwd restored to /home/$USER/dotfiles

Processing tasks...

cwd now /home/$USER

cwd restored to /home/$USER/dotfiles

Processing tasks... done