Hackily immediately change the infoview when the LSP dies.

Honestly the reason to do this now is the stupid test suite failure on
nightly.

God do I hate nvim flakiness.

lua/lean/infoview.lua

@@ -443,6 +443,12 @@ function Infoview:__update()
   pcall(info.move_pin, info, util.make_position_params())
 end
 
+---Directly mark that the infoview has died. What a shame.
+function Infoview:died()
+  self.info.pin.__data_element = components.LSP_HAS_DIED -- FIXME: yeah, gross
+  self.info.pin:__update()
+end
+
 ---Either open or close a diff window for this infoview depending on whether its info has a diff pin.
 function Infoview:__refresh_diff()
   if not self.window then
@@ -1259,7 +1265,7 @@ function infoview.enable(opts)
           if not current_infoview then
             return
           end
-          current_infoview:__update()
+          current_infoview:died()
         end),
       })
 

spec/infoview/contents_spec.lua

@@ -485,12 +485,7 @@ describe('interactive infoview', function()
           return vim.tbl_isempty(vim.lsp.get_clients())
         end)
         assert.message("Couldn't kill the LSP!").is_true(succeeded)
-
-        -- We don't immediately mark the infoview with our dead message.
-        -- In theory maybe we could by attaching to `LspDetach` and triggering
-        -- a final update, but for now this seems OK.
-        helpers.move_cursor { to = { 1, 6 } }
-        assert.infoview_contents.are '🪦 The Lean language server is dead.'
+        assert.infoview_contents_nowait.are '🪦 The Lean language server is dead.'
       end)
     end)
   )