completion: put matching ctags symbol names directly into COMPREPLY

diff --git a/builtin/difftool.c b/builtin/difftool.c
index 42ad9e804aa65ee6397a58ea853bb6510fd71918..b5e85ab0794fc08941cfdb87c4a8c2e62447e199 100644 (file)
--- a/builtin/difftool.c
+++ b/builtin/difftool.c
@@ -567,7 +567,7 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
                                warning(_("both files modified: '%s' and '%s'."),
                                        wtdir.buf, rdir.buf);
                                warning(_("working tree file has been left."));
-                               warning("");
+                               warning("%s", "");
                                err = 1;
                        } else if (unlink(wtdir.buf) ||
                                   copy_file(wtdir.buf, rdir.buf, st.st_mode))