fmt: array newlines test

vlib/v/fmt/fmt.v

@@ -482,11 +482,11 @@ fn (var f Fmt) expr(node ast.Expr) {
 						f.wrap_long_line()
 					}
 					f.expr(expr)
-					if i < it.exprs.len - 1 {
-						f.write(', ')
-					}
 					if line_nr < pos.line_nr {
+						// Previous element was on a different line, add a newline
 						f.writeln('')
+					} else if i < it.exprs.len - 1 {
+						f.write(', ')
 					}
 					line_nr = pos.line_nr
 				}

vlib/v/fmt/tests/array_newlines_keep.vv

@@ -0,0 +1,12 @@
+fn make_flag(a, b, c string) string {
+	return ''
+}
+
+fn main() {
+	// Set up flags
+	expected_flags := [
+		make_flag('solaris', '-L', '/opt/local/lib')
+		make_flag('darwin', '-framework', 'Cocoa')
+		make_flag('windows', '-l', 'gdi32')
+	]
+}