Add ui test for multiple_bound_locations lint

Author: GuillaumeGomez

tests/ui/multiple_bound_locations.rs

@@ -0,0 +1,24 @@
+#![warn(clippy::multiple_bound_locations)]
+
+fn ty<F: std::fmt::Debug>(a: F)
+//~^ ERROR: bound is defined in more than one place
+where
+    F: Sized,
+{
+}
+
+fn lifetime<'a, 'b: 'a, 'c>(a: &'b str, b: &'a str, c: &'c str)
+//~^ ERROR: bound is defined in more than one place
+where
+    'b: 'c,
+{
+}
+
+fn ty_pred<F: Sized>()
+//~^ ERROR: bound is defined in more than one place
+where
+    for<'a> F: Send + 'a,
+{
+}
+
+fn main() {}

tests/ui/multiple_bound_locations.stderr

@@ -0,0 +1,32 @@
+error: bound is defined in more than one place
+  --> $DIR/multiple_bound_locations.rs:3:7
+   |
+LL | fn ty<F: std::fmt::Debug>(a: F)
+   |       ^
+...
+LL |     F: Sized
+   |     ^
+   |
+   = note: `-D clippy::multiple-bound-locations` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::multiple_bound_locations)]`
+
+error: bound is defined in more than one place
+  --> $DIR/multiple_bound_locations.rs:9:17
+   |
+LL | fn lifetime<'a, 'b: 'a, 'c>(a: &'b str, b: &'a str, c: &'c str)
+   |                 ^^
+...
+LL |     'b: 'c
+   |     ^^
+
+error: bound is defined in more than one place
+  --> $DIR/multiple_bound_locations.rs:15:12
+   |
+LL | fn ty_pred<F: Sized>()
+   |            ^
+...
+LL |     for<'a> F: Send + 'a
+   |             ^
+
+error: aborting due to 3 previous errors
+