Description

This PR improves how whitespace is handled while writing SVG documents so that redundant whitespace is omitted.

Motivation and Context

Previously whitespace would be conservatively retained, causing files to be larger than necessary.

How Has This Been Tested?

• Unit tests
• w3c & oxygen

Types of changes

Features

• Removes redundant whitespace while printing SVG document
• Added handling for xml:space="preserve"

Breaking changes

• Defaults of xmlwriter options updated to remove whitespace by default
• TrimWhitespace renamed to Space, updated variants

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.