minor overview edit

Author: pdiffley

packages/docs/content/docs/collab/overview.mdx

@@ -17,8 +17,8 @@ through the relevant database and API decisions as well.**
 
 Pitter Patter Collab is based on
 [`prosemirror-collab-commit`](https://github.com/stepwisehq/prosemirror-collab-commit), an
-alternative `prosemirror-collab` implementation that provides improved throughput and fairness over
-the default implementation. This means that it uses ProseMirror steps as the unit of change, just
+alternative `prosemirror-collab` implementation that provides improved throughput and merge fairness over
+the default implementation. It uses ProseMirror steps as the unit of change, just
 like `prosemirror-collab` (and just like non-collaborative ProseMirror), which makes it
 straightforward to inspect, debug, and analyze.