Fix overwriting of existing symlinks
Fix overwriting of existing symlinks

Check for is_symlink() to also overwrite invalid and outdated symlinks. Also show better error message if link path exists but is not symlink (i.e. file or directory).

explosion/spaCy,aikramer2/spaCy,aikramer2/spaCy,explosion/spaCy,spacy-io/spaCy,honnibal/spaCy,aikramer2/spaCy,recognai/spaCy,recognai/spaCy,recognai/spaCy,recognai/spaCy,spacy-io/spaCy,recognai/spaCy,spacy-io/spaCy,explosion/spaCy,explosion/spaCy,spacy-io/spaCy,aikramer2/spaCy,spacy-io/spaCy,aikramer2/spaCy,recognai/spaCy,honnibal/spaCy,honnibal/spaCy,spacy-io/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,aikramer2/spaCy