- Update doc of function `AddChart()`;

- Readme updated;
- go test update

1 files changed, 2 insertions, 2 deletions

diff --git a/README.md b/README.md
index 3f71454..0e13138 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ With Excelize chart generation and management is as easy as a few lines of code.
 
 ![Excelize](./test/images/chart.png "Excelize")
 
-```
+```go
 package main
 
 import (
@@ -107,7 +107,7 @@ import (
 )
 
 func main() {
-	categories := map[string]string{"A2": "Small", "A3": "Normal", "A4": "Large", "B1": "Large", "C1": "Apple", "D1": "Pear"}
+	categories := map[string]string{"A2": "Small", "A3": "Normal", "A4": "Large", "B1": "Apple", "C1": "Orange", "D1": "Pear"}
 	values := map[string]int{"B2": 2, "C2": 3, "D2": 3, "B3": 5, "C3": 2, "D3": 4, "B4": 6, "C4": 7, "D4": 8}
 	xlsx := excelize.CreateFile()
 	for k, v := range categories {