Examples should not combine trimTrailingWhitespace with *.md (Markdown)

[Marcono1234]

The examples for the Gradle and Maven plugin show the combination of using trimTrailingWhitespace for *.md (Markdown) files:

spotless/plugin-gradle/README.md

Lines 107 to 111 in 676a069

	// define the files to apply `misc` to
	target '*.gradle', '*.md', '.gitignore'
	// define the steps to apply to those files
	trimTrailingWhitespace()

spotless/plugin-maven/README.md

Lines 90 to 95 in 676a069

	<includes>
	<include>*.md</include>
	<include>.gitignore</include>
	</includes>
	<!-- define the steps to apply to those files -->
	<trimTrailingWhitespace/>

The problem is that Markdown uses two trailing spaces for hard line breaks. So applying these examples will most likely break formatting of some Markdown files.

It would be good if the examples either did not use *.md, or did not use trimTrailingWhitespace.