[wp-trac] [WordPress Trac] #43104: Add Markdown trailing whitespace rule to `.editorconfig`

[WordPress Trac]

#43104: Add Markdown trailing whitespace rule to `.editorconfig`
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 Reporter:  netweb            |      Owner:
     Type:  enhancement       |     Status:  new
 Priority:  normal            |  Milestone:  5.0
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:
  Focuses:                    |
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 With Gutenberg being merged as part of WordPress 5.0 having WordPress'
 build tools have parity with that of Gutenberg will be advantageous and
 one less issue to worry about when merge time comes.

 This ticket adds support to `.editorconfig` to not ''trim trailing
 whitespace''

 See
 https://github.com/WordPress/gutenberg/blob/master/.editorconfig#L20-L21

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Ticket URL: <https://core.trac.wordpress.org/ticket/43104>
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