Fix type class spelling

Author: asakaev

docs/blog/_posts/2019-08-30-18th-dotty-milestone-release.md

@@ -264,7 +264,7 @@ We are making steady progress with the language metaprogramming features. The me
 - Runtime staging `run` moved to `scala.quoted.staging` in [#7077](https://github.com/lampepfl/dotty/pull/7077).
 - Runtime staging factored out to a separate library in [#7080](https://github.com/lampepfl/dotty/pull/7080).
 
-## Type class Derivation
+## Type Class Derivation
 Type class derivation has received a major rework and an [updated documentation](https://dotty.epfl.ch/docs/reference/contextual/derivation.html). We have dropped the usage of the `Shape` type to describe the shape of a type. Instead, all the relevant information is now encoded in the `Mirror` type and its subtypes as tuples.
 
 For more information, see the [documentation](https://dotty.epfl.ch/docs/reference/contextual/derivation.html).

docs/blog/_posts/2020-06-22-25th-dotty-milestone-release.md

@@ -24,7 +24,7 @@ Product -- Tuple -+- EmptyTuple
                   +- NonEmptyTuple -- *:[Head, Tail <: Tuple]
 ```
 
-This change impacts existing typeclass derivation codebases in that they now should use `EmptyTuple` instead of `Unit` in the tuple context.
+This change impacts existing type class derivation codebases in that they now should use `EmptyTuple` instead of `Unit` in the tuple context.
 
 # Avoid excessive slowdowns when suggesting missing imports in error messages
 Dotty brings to the user an enhanced error reporting when it comes to programming with givens. This better error reporting, however, proved to be a trade-off. Sometimes it takes an unreasonable amount of time and space to compute a quality suggestion to the end user.

docs/docs/reference/changed-features/structural-types.md

@@ -115,7 +115,7 @@ Structural calls like this tend to be much slower than normal method calls. The
 `reflectiveSelectable` conversion. However, to warn against inefficient
 dispatch, Scala 2 requires a language import `import scala.language.reflectiveCalls`.
 
-Before resorting to structural calls with Java reflection one should consider alternatives. For instance, sometimes a more a modular _and_ efficient architecture can be obtained using typeclasses.
+Before resorting to structural calls with Java reflection one should consider alternatives. For instance, sometimes a more a modular _and_ efficient architecture can be obtained using type classes.
 
 ## Extensibility
 

docs/docs/reference/contextual/motivation.md

@@ -60,8 +60,8 @@ This section also contains pages describing other language features that are rel
 
  - [Context Bounds](./context-bounds.md), which carry over unchanged.
  - [Extension Methods](./extension-methods.md) replace implicit classes in a way that integrates better with type classes.
- - [Implementing Type classes](type-classes.md) demonstrates how some common type classes can be implemented using the new constructs.
- - [Type class Derivation](./derivation.md) introduces constructs to automatically derive type class instances for ADTs.
+ - [Implementing Type Classes](type-classes.md) demonstrates how some common type classes can be implemented using the new constructs.
+ - [Type Class Derivation](./derivation.md) introduces constructs to automatically derive type class instances for ADTs.
  - [Multiversal Equality](./multiversal-equality.md) introduces a special type class to support type safe equality.
  - [Context Functions](./context-functions.md) provide a way to abstract over context parameters.
  - [By-Name Context Parameters](./by-name-context-parameters.md) are an essential tool to define recursive synthesized values without looping.

docs/docs/reference/contextual/relationship-implicits.md

@@ -125,7 +125,7 @@ implicit class CircleDecorator(c: Circle) extends AnyVal {
 
 Abstract extension methods in traits that are implemented in given instances have no direct counterpart in Scala-2. The only way to simulate these is to make implicit classes available through imports. The Simulacrum macro library can automate this process in some cases.
 
-### Type class Derivation
+### Type Class Derivation
 
 Type class derivation has no direct counterpart in the Scala 2 language. Comparable functionality can be achieved by macro-based libraries such as Shapeless, Magnolia, or scalaz-deriving.
 

docs/sidebar.yml

@@ -57,7 +57,7 @@ sidebar:
               url: docs/reference/contextual/extension-methods.html
             - title: Implementing Type classes
               url: docs/reference/contextual/type-classes.html
-            - title: Type class Derivation
+            - title: Type Class Derivation
               url: docs/reference/contextual/derivation.html
             - title: Multiversal Equality
               url: docs/reference/contextual/multiversal-equality.html

tests/patmat/i6088.scala

@@ -3,7 +3,7 @@ trait ~>[F[_], G[_]] {
   def apply[A](fa: F[A]): G[A]
 }
 
-/** Higher-kinded pattern functor typeclass. */
+/** Higher-kinded pattern functor type class. */
 trait HFunctor[H[f[_], i]] {
   def hmap[A[_], B[_]](nt: A ~> B): ([x] =>> H[A,x]) ~> ([x] =>> H[B,x])
 }