minor fix in readme.md
@@ -36,7 +36,7 @@ Finally, install `toppra` with
git clone https://github.com/hungpham2511/toppra
cd toppra/
pip install -r requirements.txt --user
-pip install . -e --user
+pip install -e . --user
```
And you are good to go. If you have `openrave` installed on your computer, you can
run the below example to see `toppra` in action.
