feat: treate space as falsy value from env variable

Author: marjune163

src/util/env.go

@@ -21,7 +21,12 @@ func isTruthyEnvValue(value string) bool {
 	}
 
 	for i := 0; i < valueLen; i++ {
-		if value[i] != '0' {
+		if value[i] != '0' &&
+			value[i] != ' ' &&
+			value[i] != '\t' &&
+			value[i] != '\f' &&
+			value[i] != '\r' &&
+			value[i] != '\n' {
 			return true
 		}
 	}

src/util/env_test.go

@@ -39,4 +39,12 @@ func TestIsTruthyEnvValue(t *testing.T) {
 	if !expect("0000", false) {
 		t.Error()
 	}
+
+	if !expect(" ", false) {
+		t.Error()
+	}
+
+	if !expect(" 0", false) {
+		t.Error()
+	}
 }