diff --git a/docs/designers-developers/developers/data/data-core-block-editor.md b/docs/designers-developers/developers/data/data-core-block-editor.md
index 05bd3906353ffc..5c6b79d9309963 100644
--- a/docs/designers-developers/developers/data/data-core-block-editor.md
+++ b/docs/designers-developers/developers/data/data-core-block-editor.md
@@ -115,7 +115,7 @@ _Parameters_
_Returns_
-- `?Object`: Block attributes.
+- `Object?`: Block attributes.
# **getBlockCount**
@@ -259,7 +259,7 @@ _Parameters_
- _state_ `Object`: Editor state.
- _clientId_ `string`: Block from which to find root client ID.
-- _blockName_ `(string|Array)`: Block name(s) to filter.
+- _blockName_ `string|string[]`: Block name(s) to filter.
- _ascending_ `boolean`: Order results from bottom to top (true) or top to bottom (false).
_Returns_
@@ -300,7 +300,7 @@ _Parameters_
_Returns_
-- `Array