consider -> considered
Fixes a typo.
@@ -94,7 +94,7 @@ impl Shape for Circle {
### Trait Implementation Coherence
-A trait implementation is consider incoherent if either the orphan check fails
+A trait implementation is considered incoherent if either the orphan check fails
or there are overlapping implementation instances.
Two trait implementations overlap when there is a non-empty intersection of the
