Rename /:memory: to /_memory

[simonw]

For consistency with /_internal - and because then we don't need to escape the : characters.

This change would need to be in before Datasette 1.0. I could land it earlier and set up redirects from the old URLs though.

[simonw]

I'm going to do this, with redirects from /:memory:*.

[simonw]

Here are the redirect tests:

datasette/tests/test_api.py

Lines 635 to 648 in 1600d2a

	@pytest.mark.parametrize(
	"path,expected_redirect",
	(
	("/:memory:", "/_memory"),
	("/:memory:.json", "/_memory.json"),
	("/:memory:?sql=select+1", "/_memory?sql=select+1"),
	("/:memory:.json?sql=select+1", "/_memory.json?sql=select+1"),
	("/:memory:.csv?sql=select+1", "/_memory.csv?sql=select+1"),
	),
	)
	def test_old_memory_urls_redirect(app_client_no_files, path, expected_redirect):
	response = app_client_no_files.get(path, allow_redirects=False)
	assert response.status == 301
	assert response.headers["location"] == expected_redirect

[simonw]

I also checked that the following works:

echo '{"foo": "bar"}' | sqlite-utils insert _memory.db demo -
datasette _memory.db --memory

Sure enough, it results in the following Datasette homepage - thanks to #509