vim-patch:8.1.0043: ++bad argument of :edit does not work properly

Problem:    ++bad argument of :edit does not work properly.
Solution:   Return FAIL from get_bad_opt() only when there is no valid
            argument. (Dominique Pelle, Christian Brabandt, closes vim/vim#2966,
            closes vim/vim#2947)
7580849df9

src/nvim/ex_docmd.c

@@ -4547,8 +4547,10 @@ int get_bad_opt(const char_u *p, exarg_T *eap)
     eap->bad_char = BAD_DROP;
   } else if (MB_BYTE2LEN(*p) == 1 && p[1] == NUL) {
     eap->bad_char = *p;
+  } else {
+    return FAIL;
   }
-  return FAIL;
+  return OK;
 }
 
 /*