fmt: remove all unnecessary parenthesis at once, instead of one pair at a time (#18441)

vlib/v/fmt/fmt.v

@@ -2599,15 +2599,15 @@ pub fn (mut f Fmt) or_expr(node ast.OrExpr) {
 }
 
 pub fn (mut f Fmt) par_expr(node ast.ParExpr) {
-	requires_paren := node.expr !is ast.Ident
-	if requires_paren {
-		f.par_level++
-		f.write('(')
-	}
 	mut expr := node.expr
 	for mut expr is ast.ParExpr {
 		expr = expr.expr
 	}
+	requires_paren := expr !is ast.Ident
+	if requires_paren {
+		f.par_level++
+		f.write('(')
+	}
 	f.expr(expr)
 	if requires_paren {
 		f.par_level--

vlib/v/fmt/tests/extra_par_expr_expected.vv

@@ -1,4 +1,9 @@
 fn main() {
+	x := 3
+	_ := &x
+	_ := &x
+	_ := &x
+
 	_, _ := (22 > 11), (43 > 22)
 	_ := (10 + 11)
 	_ := (11 * 2)

vlib/v/fmt/tests/extra_par_expr_input.vv

@@ -1,4 +1,9 @@
 fn main() {
+	x := 3
+	_ := &((x))
+	_ := &(((x)))
+	_ := &((((x))))
+
 	_, _ := (((22 > 11))), (43 > 22)
 	_ := ((10 + 11))
 	_ := ((((((11 * 2))))))