patch 8.1.1748: :args output is not aligned

Problem:    :args output is not aligned.
Solution:   Output a line break after the last item in a row.

src/version.c

@@ -777,6 +777,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1748,
 /**/
     1747,
 /**/
@@ -4440,6 +4442,13 @@ list_in_columns(char_u **items, int size, int current)
 		    msg_putchar(' ');
 	    }
 	}
+	else
+	{
+	    // this row is out of items, thus at the end of the row
+	    if (msg_col > 0 && cur_row < nrow)
+		msg_putchar('\n');
+	    ++cur_row;
+	}
     }
 }