Issue #3424233 by el7cosmos, daniel-san: Add ability to override twig template in theme

Closes #3424233

added 3 commits

• 0e0dcf70...eb4b6d4e - 2 commits from branch project:2.x
• f72e1388 - Implements hook_theme.

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changed title from Add ability to override twig template in theme to Issue #3424233 by el7cosmos, daniel-san: Add ability to override twig template in theme

added 1 commit

• 888053b0 - phpcs

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merged