feat: stdpath('run'), /tmp/nvim.user/ #18993

Problem:
- Since c57f6b28d71d #8519, sockets are created in ~/.local/… but XDG
  spec says: "XDG_RUNTIME_DIR: Must be on the local filesystem", which
  implies that XDG_STATE_DIR is potentially non-local.
- Not easy to inspect Nvim-created temp files (for debugging etc).

Solution:
- Store sockets in stdpath('run') ($XDG_RUNTIME_DIR).
- Establish "/tmp/nvim.user/" as the tempdir root shared by all Nvims.
- Make ok() actually useful.
- Introduce assert_nolog().

closes #3517
closes #17093

1 files changed, 2 insertions, 1 deletions

diff --git a/test/functional/core/startup_spec.lua b/test/functional/core/startup_spec.lua
index 5ba80a3646..fc9ea72ff2 100644
--- a/test/functional/core/startup_spec.lua
+++ b/test/functional/core/startup_spec.lua
@@ -399,7 +399,8 @@ describe('startup', function()
     eq({'ordinary', 'FANCY', 'mittel', 'FANCY after', 'ordinary after'}, exec_lua [[ return _G.test_loadorder ]])
 
     local rtp = meths.get_option'rtp'
-    ok(startswith(rtp, 'test/functional/fixtures/nvim,test/functional/fixtures/pack/*/start/*,test/functional/fixtures/start/*,test/functional/fixtures,test/functional/fixtures/middle,'), 'rtp='..rtp)
+    ok(startswith(rtp, 'test/functional/fixtures/nvim,test/functional/fixtures/pack/*/start/*,test/functional/fixtures/start/*,test/functional/fixtures,test/functional/fixtures/middle,'),
+      'startswith(…)', 'rtp='..rtp)
   end)
 
   it("handles the correct order with opt packages and after/", function()