Apply suggestions from code review

Author: alexcjohnson

components/dash-core-components/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change Log for dash-core-components
 ### NOTE: as of v2.0, changes in dash-core-component are all being recorded in the main dash changelog.
-###This file is kept only for historical purposes.
+### This file is kept only for historical purposes.
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 

components/dash-html-components/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change Log for dash-html-components
 ### NOTE: as of v2.0, changes in dash-html-components are all being recorded in the main dash changelog.
-###This file is kept only for historical purposes.
+### This file is kept only for historical purposes.
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).