remove u8 and i32 from tests and examples

vlib/builtin/int.v

@@ -81,20 +81,20 @@ pub fn (nn u32) str() string {
 }
 
 /*
-pub fn (nn u8) str() string {
+pub fn (nn byte) str() string {
 	 mut n := nn
-	if n == u8(0) {
+	if n == byte(0) {
 		return '0'
 	}
 	max := 5
 	mut buf := malloc(max)
 	mut len := 0
 	// Fill the string from the end
-	for n > u8(0) {
-		d := n % u8(10)
-		buf[max - len - 1] = d + u8(`0`)
+	for n > byte(0) {
+		d := n % byte(10)
+		buf[max - len - 1] = d + byte(`0`)
 		len++
-		n = n / u8(10)
+		n = n / byte(10)
 	}
 	return tos(buf + max - len, len)
 }

vlib/builtin/int_test.v

@@ -20,8 +20,8 @@ fn test_str_methods() {
 	assert i64(1).str() == '1'
 	assert i64(-1).str() == '-1'
 
-	assert u8(1).str() == '1'
-	assert u8(-1).str() == '255'
+	assert byte(1).str() == '1'
+	assert byte(-1).str() == '255'
 	assert u16(1).str() == '1'
 	assert u16(-1).str() == '65535'
 	assert u32(1).str() == '1'

vlib/builtin/string_test.v

@@ -417,4 +417,4 @@ fn test_for_loop_two() {
 	for i, c in s {
 		assert c == s[i]
 	}
-}
+}