* lisp/progmodes/project.el (project--files-in-directory): Make sure the directory includes the trailing slash in case it's a symlink, discussed in https://lists.gnu.org/archive/html/emacs-devel/2021-01/msg00345.html. * lisp/progmodes/xref.el (xref-matches-in-directory): Same. * lisp/cedet/semantic/symref/grep.el (semantic-symref-perform-search): Same.