Cleanup cspell directives

Problem/Motivation

I noticed two errors in the use of the cspell directives.

1) In ckeditor5 *.js files cspell:words is used instead of cspell:ignore
2) in d7_block.yml there is a space after cspell in the ignore line.

Steps to reproduce

Proposed resolution

Fix both usages

Remaining tasks

Review

User interface changes

API changes

Data model changes

Release notes snippet