Improved code style

src/expression/Expression_test.go

@@ -1,7 +1,7 @@
 package expression_test
 
 import (
-	"fmt"
+	"errors"
 	"testing"
 
 	"git.akyoto.dev/cli/q/src/expression"
@@ -110,14 +110,11 @@ func TestParse(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		test := test
-
 		t.Run(test.Name, func(t *testing.T) {
 			src := []byte(test.Expression)
 			tokens := token.Tokenize(src)
 			expr := expression.Parse(tokens)
 			defer expr.Reset()
-
 			assert.NotNil(t, expr)
 			assert.Equal(t, expr.String(src), test.Result)
 		})
@@ -150,7 +147,7 @@ func TestEachLeaf(t *testing.T) {
 	assert.DeepEqual(t, leaves, []string{"1", "2", "3", "4", "5", "6", "7", "8"})
 
 	err = expr.EachLeaf(func(leaf *expression.Expression) error {
-		return fmt.Errorf("error")
+		return errors.New("error")
 	})
 
 	assert.NotNil(t, err)

src/expression/bench_test.go

@@ -11,7 +11,7 @@ func BenchmarkExpression(b *testing.B) {
 	src := []byte("(1+2-3*4)+(5*6-7+8)")
 	tokens := token.Tokenize(src)
 
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		expression.Parse(tokens)
 	}
 }