tools: format most examples and tutorials, add them to v test-cleancode (#9826)

examples/word_counter/word_counter.v

@@ -1,7 +1,6 @@
 // Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
 // Use of this source code is governed by an MIT license
 // that can be found in the LICENSE file.
-
 import os
 
 fn main() {
@@ -9,15 +8,14 @@ fn main() {
 	if os.args.len != 2 {
 		println('usage: word_counter [text_file]')
 		println('using $path')
-	}
-	else {
+	} else {
 		path = os.args[1]
 	}
 	contents := os.read_file(path.trim_space()) or {
 		println('failed to open $path')
 		return
 	}
-	mut m := map[string]int
+	mut m := map[string]int{}
 	for word in extract_words(contents) {
 		m[word]++
 	}
@@ -37,8 +35,7 @@ fn extract_words(contents string) []string {
 	for space_splitted in contents.to_lower().split(' ') {
 		if space_splitted.contains('\n') {
 			splitted << space_splitted.split('\n')
-		}
-		else {
+		} else {
 			splitted << space_splitted
 		}
 	}