Rename Miscellaneous to Operation now that it is the only thing on that page

docs/Summary.md

@@ -40,7 +40,7 @@
   - [PointRef](./api/point-ref.md)
   - [Range](./api/range.md)
   - [RangeRef](./api/range-ref.md)
-- [Miscellaneous](./api/miscellaneous.md)
+- [Operation](./api/operation.md)
 
 ## Libraries
 

docs/api/operation.md

@@ -1,5 +1,5 @@
-# Miscellaneous
-
-## Operation
+# Operation
 
 `Operation` objects define the low-level instructions that Slate editors use to apply changes to their internal state. Representing all changes as operations is what allows Slate editors to easily implement history, collaboration, and other features.
+
+_The `Operation` API reference needs to be added._