This also fixes the following warning in tests with ASAN or TSAN:
-------- Running tests from test/functional/plugin/lsp/inline_completion_spec.lua
RUN T4604 vim.lsp.inline_completion enable() requests or abort when entered/left insert mode: 225.00 ms OK
RUN T4605 vim.lsp.inline_completion get() applies the current candidate: 212.00 ms OK
nvim took 2013 milliseconds to exit after last test
This indicates a likely problem with the test even if it passed!
RUN T4606 vim.lsp.inline_completion get() accepts on_accept callback: 212.00 ms OK
RUN T4607 vim.lsp.inline_completion select() selects the next candidate: 220.00 ms OK
-------- 4 tests from test/functional/plugin/lsp/inline_completion_spec.lua (3437.00 ms total)
-------- Running tests from test/functional/plugin/lsp/linked_editing_range_spec.lua
nvim took 2011 milliseconds to exit after last test
This indicates a likely problem with the test even if it passed!
The flakiness happens because get() uses vim.schedule(), and a following
key may be processed before the scheduled event. Use poke_eventloop() to
ensure that the scheduled event is processed.
