Results 4 issues of mackong

When start in qtconsole like ``` jupyter-qtconsole --kernel=gophernotes ``` Enter pressed, the terminal show following messages: ``` 2020/12/22 19:19:46 Unhandled shell message: history_request 2020/12/22 19:19:50 Unhandled shell message: is_complete_request ```...

Currently, deadlock.py open deadlock.c in relative path, which make deadlock.py only can run in the installation directory. This patch make deadlock.c opened in absolute path, then we can run deadlock.py...

输入topic的时候还是在posframe ![image](https://user-images.githubusercontent.com/2212586/99402574-74331b80-2924-11eb-88af-865f518fc973.png) 但是多个的时候,就自动跳到minibuffer了 ![image](https://user-images.githubusercontent.com/2212586/99402478-5b2a6a80-2924-11eb-807c-37b1c478dfc7.png) 这个怎么统一都在posframe里面呢?

On Android, run mul_mat with matrix A(200x200) and matrix B(200x200), and element values are all *1* of A and B. expect result a 200x200 matrix with all element values *200*....