Improve legibility of RunOnce::run_unsafe param (#2181)

Nilirad · Nilirad · commit 1f0988be87f2 · 2021-05-18T00:10:17.000Z
During PR #2046 @cart suggested that the `(): ()` notation is less legible than `_input: ()`. The first notation still managed to slip in though. This PR applies the second writing.
diff --git a/crates/bevy_ecs/src/schedule/run_criteria.rs b/crates/bevy_ecs/src/schedule/run_criteria.rs
@@ -406,7 +406,7 @@ impl System for RunOnce {
         true
     }
 
-    unsafe fn run_unsafe(&mut self, (): (), _world: &World) -> ShouldRun {
+    unsafe fn run_unsafe(&mut self, _input: (), _world: &World) -> ShouldRun {
         if self.ran {
             ShouldRun::No
         } else {

Original file line number	Diff line number	Diff line change
`@@ -406,7 +406,7 @@ impl System for RunOnce {`
`406`	`406`	`true`
`407`	`407`	`}`
`408`	`408`
`409`		`- unsafe fn run_unsafe(&mut self, (): (), _world: &World) -> ShouldRun {`
	`409`	`+ unsafe fn run_unsafe(&mut self, _input: (), _world: &World) -> ShouldRun {`
`410`	`410`	`if self.ran {`
`411`	`411`	`ShouldRun::No`
`412`	`412`	`} else {`