Can't use comma in script/commands

Dunno is it correct or not, but this line in my script section:
```
script:
- echo "aaa,aaa,aaa"
```
always transforms in:
```
echo "aaa
aaa
aaa"
```
Guessing because of StringSlice call in https://github.com/appleboy/drone-ssh/blob/master/main.go#L171

But i need these commas. They must remain. Can i escape commas? Any solution?

Start in main.go around line 171, where the issue identifies the StringSlice call. Reproduce the transformation with the provided script command containing commas, then trace how the command is split. Done means commas remain intact in the resulting remote command, with a regression test covering the example.

Written by the indexing model from the issue text.