docs: Fix a few typos

[timgates42]

There are small typos in:

• EditorandEditorEnhancements.md
• ToolandUtilities.md
• Visualization.md

Fixes:

• Should read powerful rather than powerfull.
• Should read plotting rather than plottling.
• Should read multiple rather than mulitple.
• Should read environment rather than environement.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md