fmt: fix missing space after single line array pre comments (#8904)

vlib/v/ast/str.v

@@ -255,7 +255,7 @@ pub fn (x Expr) str() string {
 				return '/* $lines.len lines comment */'
 			} else {
 				text := x.text.trim('\x01').trim_space()
-				return '// $text'
+				return '´// $text´'
 			}
 		}
 		ComptimeSelector {

vlib/v/fmt/fmt.v

@@ -1970,9 +1970,14 @@ pub fn (mut f Fmt) array_init(it ast.ArrayInit) {
 		f.comment(c, level: .indent, iembed: true)
 		last_line_nr = c.pos.last_line
 	}
-	if it.exprs.len == 0 && it.pre_cmnts.len > 0 && it.pre_cmnts[0].pos.line_nr != it.pos.line_nr {
+	if it.pre_cmnts.len > 0 {
+		same_line := it.pre_cmnts[0].pos.line_nr == it.pos.line_nr
+		if same_line && it.exprs.len > 0 {
+			f.write(' ')
+		} else if !same_line && it.exprs.len == 0 {
 			f.writeln('')
 		}
+	}
 	for i, expr in it.exprs {
 		line_nr := expr.position().line_nr
 		if i == 0 {

vlib/v/fmt/tests/comments_embedded_keep.vv

@@ -10,3 +10,8 @@ fn only_comments_array() {
 		/* 4, */
 	]
 }
+
+fn array_pre_comments() {
+	_ := [/* 2, */ 3]
+	_ := [/* 4, */ /* 5, */ 6]
+}