refactor: Generalize test file name

src/build/arg_tests.rs

@@ -1,8 +0,0 @@
-use crate::Arg;
-
-// This test will *fail to compile* if Arg is not Send + Sync
-#[test]
-fn arg_send_sync() {
-    fn foo<T: Send + Sync>(_: T) {}
-    foo(Arg::new("test"))
-}

src/build/mod.rs

@@ -19,9 +19,7 @@ mod regex;
 mod debug_asserts;
 
 #[cfg(test)]
-mod app_tests;
-#[cfg(test)]
-mod arg_tests;
+mod tests;
 
 pub use app::App;
 pub use app_settings::{AppFlags, AppSettings};

src/build/tests.rs

@@ -1,4 +1,5 @@
 use crate::App;
+use crate::Arg;
 
 #[test]
 fn propagate_version() {
@@ -46,3 +47,10 @@ fn issue_2090() {
         .unwrap()
         .is_disable_version_flag_set());
 }
+
+// This test will *fail to compile* if Arg is not Send + Sync
+#[test]
+fn arg_send_sync() {
+    fn foo<T: Send + Sync>(_: T) {}
+    foo(Arg::new("test"))
+}