string: fix a bug with split()

vlib/builtin/string.v

@@ -238,8 +238,6 @@ pub fn (s string) split(delim string) []string {
 	}
 	if delim.len == 1 {
 		return s.split_single(delim[0])
-		// println('split 1 only')
-		// os.exit()
 	}
 	mut i := 0
 	mut start := 0// - 1
@@ -283,15 +281,15 @@ pub fn (s string) split_single(delim byte) []string {
 	mut i := 0
 	mut start := 0
 	for i < s.len {
-		a := s[i] == delim
-		b := i == s.len - 1
-		if a || b {
-			if i == s.len - 1 {
+		is_delim := s[i] == delim
+		last := i == s.len - 1
+		if is_delim || last {
+			if !is_delim && i == s.len - 1 {
 				i++
 			}
 			val := s.substr(start, i)
 			if val.len > 0 {
-				res << val.trim_space()
+				res << val 
 			}
 			start = i + 1
 		}

vlib/builtin/string_test.v

@@ -106,6 +106,13 @@ fn test_split() {
 	assert vals[0]== '4627a862c3dec29fb3182a06b8965e0025759e18'
 	assert vals[1]=='1530207969'
 	assert vals[2]== 'blue'
+	// /////////
+	s = 'lalala'
+	vals = s.split('a') 
+	assert vals.len == 3 
+	assert vals[0] == 'l' 
+	assert vals[1] == 'l' 
+	assert vals[2] == 'l' 
 }
 
 fn test_trim_space() {