Scripts: move the Startup and Shutdown script tests into tests/startup.rs

The tests now sit with the crate's other test modules under crates/script/src/tests/ and are declared in tests.rs. docs/scripting-parity.md points at the new path.

crates/script/src/lib.rs

@@ -88,8 +88,6 @@ pub fn run_code(s: &mut Session, code: &str, name: &str) -> Outcome {
 
 #[cfg(test)]
 mod tests;
-#[cfg(test)]
-mod tests_startup;
 
 // #760: `$.evalFile` and `BridgeTalk`.
 // `/browser/…` is the web editor's file table, an absolute path on wasm; on Windows it has no

crates/script/src/tests.rs

@@ -17,6 +17,7 @@ mod include;
 mod panels;
 #[cfg(not(windows))]
 mod services;
+mod startup;
 mod tasks;
 mod ui;
 mod ui_more;