factor into struct, and comments

src/test/ui/lint/must_not_suspend/boxed.stderr

@@ -1,10 +1,10 @@
-error: boxed `Umm` held across a yield point, but should not be
+error: boxed `Umm` held across a suspend point, but should not be
   --> $DIR/boxed.rs:20:9
    |
 LL |     let _guard = bar();
    |         ^^^^^^
 LL |     other().await;
-   |     ------------- the value is held across this yield point
+   |     ------------- the value is held across this suspend point
    |
 note: the lint level is defined here
   --> $DIR/boxed.rs:3:9
@@ -16,7 +16,7 @@ note: You gotta use Umm's, ya know?
    |
 LL |     let _guard = bar();
    |         ^^^^^^
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/boxed.rs:20:9
    |
 LL |     let _guard = bar();

src/test/ui/lint/must_not_suspend/handled.rs

@@ -0,0 +1,28 @@
+// edition:2018
+// run-pass
+#![feature(must_not_suspend)]
+#![deny(must_not_suspend)]
+
+#[must_not_suspend = "You gotta use Umm's, ya know?"]
+struct Umm {
+    _i: i64
+}
+
+
+fn bar() -> Umm {
+    Umm {
+        _i: 1
+    }
+}
+
+async fn other() {}
+
+pub async fn uhoh() {
+    {
+        let _guard = bar();
+    }
+    other().await;
+}
+
+fn main() {
+}

src/test/ui/lint/must_not_suspend/ref.stderr

@@ -1,11 +1,11 @@
-error: `Umm` held across a yield point, but should not be
+error: `Umm` held across a suspend point, but should not be
   --> $DIR/ref.rs:18:26
    |
 LL |         let guard = &mut self.u;
    |                          ^^^^^^
 ...
 LL |         other().await;
-   |         ------------- the value is held across this yield point
+   |         ------------- the value is held across this suspend point
    |
 note: the lint level is defined here
   --> $DIR/ref.rs:3:9
@@ -17,27 +17,27 @@ note: You gotta use Umm's, ya know?
    |
 LL |         let guard = &mut self.u;
    |                          ^^^^^^
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/ref.rs:18:26
    |
 LL |         let guard = &mut self.u;
    |                          ^^^^^^
 
-error: `Umm` held across a yield point, but should not be
+error: `Umm` held across a suspend point, but should not be
   --> $DIR/ref.rs:18:26
    |
 LL |         let guard = &mut self.u;
    |                          ^^^^^^
 ...
 LL |         other().await;
-   |         ------------- the value is held across this yield point
+   |         ------------- the value is held across this suspend point
    |
 note: You gotta use Umm's, ya know?
   --> $DIR/ref.rs:18:26
    |
 LL |         let guard = &mut self.u;
    |                          ^^^^^^
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/ref.rs:18:26
    |
 LL |         let guard = &mut self.u;

src/test/ui/lint/must_not_suspend/trait.stderr

@@ -1,33 +1,33 @@
-error: implementer of `Wow` held across a yield point, but should not be
+error: implementer of `Wow` held across a suspend point, but should not be
   --> $DIR/trait.rs:21:9
    |
 LL |     let _guard1 = r#impl();
    |         ^^^^^^^
 ...
 LL |     other().await;
-   |     ------------- the value is held across this yield point
+   |     ------------- the value is held across this suspend point
    |
 note: the lint level is defined here
   --> $DIR/trait.rs:3:9
    |
 LL | #![deny(must_not_suspend)]
    |         ^^^^^^^^^^^^^^^^
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/trait.rs:21:9
    |
 LL |     let _guard1 = r#impl();
    |         ^^^^^^^
 
-error: boxed `Wow` trait object held across a yield point, but should not be
+error: boxed `Wow` trait object held across a suspend point, but should not be
   --> $DIR/trait.rs:22:9
    |
 LL |     let _guard2 = r#dyn();
    |         ^^^^^^^
 LL | 
 LL |     other().await;
-   |     ------------- the value is held across this yield point
+   |     ------------- the value is held across this suspend point
    |
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/trait.rs:22:9
    |
 LL |     let _guard2 = r#dyn();

src/test/ui/lint/must_not_suspend/unit.stderr

@@ -1,10 +1,10 @@
-error: `Umm` held across a yield point, but should not be
+error: `Umm` held across a suspend point, but should not be
   --> $DIR/unit.rs:20:9
    |
 LL |     let _guard = bar();
    |         ^^^^^^
 LL |     other().await;
-   |     ------------- the value is held across this yield point
+   |     ------------- the value is held across this suspend point
    |
 note: the lint level is defined here
   --> $DIR/unit.rs:3:9
@@ -16,7 +16,7 @@ note: You gotta use Umm's, ya know?
    |
 LL |     let _guard = bar();
    |         ^^^^^^
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/unit.rs:20:9
    |
 LL |     let _guard = bar();

src/test/ui/lint/must_not_suspend/warn.stderr

@@ -1,10 +1,10 @@
-warning: `Umm` held across a yield point, but should not be
+warning: `Umm` held across a suspend point, but should not be
   --> $DIR/warn.rs:20:9
    |
 LL |     let _guard = bar();
    |         ^^^^^^
 LL |     other().await;
-   |     ------------- the value is held across this yield point
+   |     ------------- the value is held across this suspend point
    |
    = note: `#[warn(must_not_suspend)]` on by default
 note: You gotta use Umm's, ya know?
@@ -12,7 +12,7 @@ note: You gotta use Umm's, ya know?
    |
 LL |     let _guard = bar();
    |         ^^^^^^
-help: `drop` this value before the yield point, or use a block (`{ ... }`) to shrink its scope
+help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point
   --> $DIR/warn.rs:20:9
    |
 LL |     let _guard = bar();