更新 'README.md'

README.md

@@ -15,15 +15,16 @@ For RNA-seq data, from bams to AS Information files.
 choppy
 Ali-Cloud
 Linux
-# 激活choppy环境
 ```
+# 激活choppy环境
+
 $ source activate choppy (open-choppy-env)
 
 # 第一次安装
-```
+
 $ choppy install chenqingwang/RNAseq-alignment
 # 非第一次安装
-```
+
 $ choppy install chenqingwang/RNAseq-alignment -f 
 
 # 查询已安装APP