fmt: format explicit map init with parameter (#12499)

vlib/v/fmt/tests/maps_expected.vv

@@ -14,3 +14,9 @@ numbers := {
 	'sevenhundredseventyseven':            777
 	'fivethousandthreehundredtwentyseven': 5327
 }
+
+explicit_init := map[string]string{}
+
+explicit_init_with_value := {
+	'abc': 0
+}

vlib/v/fmt/tests/maps_input.vv

@@ -14,3 +14,9 @@ numbers := {
   'sevenhundredseventyseven': 777
 'fivethousandthreehundredtwentyseven': 5327
 }
+
+explicit_init := map[string]string{}
+
+explicit_init_with_value := map[string]int{
+	'abc': 0
+}

vlib/v/parser/parser.v

@@ -2034,6 +2034,11 @@ pub fn (mut p Parser) name_expr() ast.Expr {
 			if p.tok.kind == .rcbr {
 				p.next()
 			} else {
+				if p.pref.is_fmt {
+					map_init := p.map_init()
+					p.check(.rcbr)
+					return map_init
+				}
 				p.error('`}` expected; explicit `map` initialization does not support parameters')
 			}
 		}