patch 8.2.2726: confusing error message with white space before commav8.2.2726

Problem:    Confusing error message with white space before comma in the
            arguments of a function declaration.
Solution:   Give a specific error message. (closes #2235)

1 files changed, 11 insertions, 0 deletions

diff --git a/src/userfunc.c b/src/userfunc.c
index 1139573c63..af107b0db6 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -307,6 +307,17 @@ get_function_args(
 		emsg(_("E989: Non-default argument follows default argument"));
 		goto err_ret;
 	    }
+
+	    if (VIM_ISWHITE(*p) && *skipwhite(p) == ',')
+	    {
+		// Be tolerant when skipping
+		if (!skip)
+		{
+		    semsg(_(e_no_white_space_allowed_before_str_str), ",", p);
+		    goto err_ret;
+		}
+		p = skipwhite(p);
+	    }
 	    if (*p == ',')
 	    {
 		++p;