This function needs a unit test.

Guide to how to contribute to an open source project on GitHub.

Test stub: https://github.com/pygame/pygame/blob/main/test/display_test.py#L255-L274
Docs: https://www.pygame.org/docs/ref/display.html#pygame.display.gl_set_attribute
Code to be tested: https://github.com/pygame/pygame/bl

Lately we decided to make rock tiles non-solid (#1609).

I found that confusing as they still looked solid to me (perhaps I was still used to playing this game with rocks being solid). The black border around the rock and the fact that it's somewhat bulky made me think it was something we could jump on :
![stone1](https://user-images.githubusercontent.com/14836881/110026977-6486e980-7cff-11eb-9

From the comment in SDL_filesystem.h:
Please call SDL_free() on the pointer when you are done with it

When building the project with MSVC, I ran into some debug heap asserts early into the program startup.
The culprit appears to be the code in m_config.c that does free(prefdir) as changing these to SDL_free(prefdir) resolved the issue.

I'm not sure what to do about `GetDefaultConfi

Modify the setup.py so it produce bdist_wheel for manylinux including the libgraphqlparser.so/a
Modify the build process so this wheel is uploaded to pypi
Modify the cffi part of tartiflette/parser so it loads this lib instead of the local one.

Is your feature request related to a problem? Please describe.
Standard mode has the usual keystrokes for notepad, but there are more that would probably be useful.

Describe the solution you'd like
As a first step, a quick review of the common keystrokes in notepad/wordpad/work, for example might throw up some obvious ones we could add

In particular, when a rare enough and puzzling enough event occurs near the start of your game, consider adding a tutorial hint explaining it. For events that occur very often, beware all of them generating messages within a few turns, swamping the player.

Grep for MsgTutorialHint to see how tutorial hint messages are added.

Edited: all messages now appear exactly once per game (each scen