Merge pull request #5827 from samueltardieu/issue-5826

printf: %c prints the first byte of its argument

tests/by-util/test_printf.rs

@@ -644,3 +644,8 @@ fn partial_char() {
             "printf: warning: bc: character(s) following character constant have been ignored\n",
         );
 }
+
+#[test]
+fn char_as_byte() {
+    new_ucmd!().args(&["%c", "🙃"]).succeeds().stdout_only("ð");
+}