fmt: keep comments after struct decl default value (#7648)

vlib/v/fmt/tests/struct_default_field_expressions_keep.vv

@@ -1,8 +1,14 @@
 struct Foo {
-	i int = 1
+	i int = 1 // A comment
 }
 
 struct Bar {
 	f Foo = &Foo(0)
 	z int [skip] = -1
 }
+
+struct Baz {
+	x int = 1 // It's one
+	y string = 'one' // It's one written out
+	z bool = true // Also one
+}

vlib/v/parser/struct.v

@@ -229,6 +229,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 						else {}
 					}
 					has_default_expr = true
+					comments << p.eat_comments()
 				}
 				// TODO merge table and ast Fields?
 				ast_fields << ast.StructField{

vlib/x/websocket/websocket_client.v

@@ -31,8 +31,7 @@ pub:
 	id                string // unique id of client
 pub mut:
 	conn              net.TcpConn // underlying TCP socket connection
-	// size of nounce used for masking
-	nonce_size        int = 16
+	nonce_size        int = 16 // size of nounce used for masking
 	panic_on_callback bool // set to true of callbacks can panic
 	state             State // current state of connection
 	logger            &log.Log // logger used to log messages