Fix terminology
Empty Padding class
Implement padding operations
Add TestPaddingToken
Refactor writer methods
Parse syntax to padding token
Record padding level
Fix equality check of padding to include level
Override add
Extract RichTextCollection.Format method
Remove checks on Add
Empty ApplyPadding method
Minor refactor
Override add to handle adding RichTextCollection
Implement padding evaluation tree
Build padding evaluation tree
Allow padding only syntax
Add scope tokens
Fix test to include scope tokens
Evaluate with scope token