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Update template comments (#23665)

* Update template comments

Make template comments consistent with recent tools changes

* Update packages/flutter_tools/templates/app/lib/main.dart.tmpl

Co-Authored-By: mit-mit <mit-mit@users.noreply.github.com>

* Fix merge conflict
M
Michael Thomsen committed
262faf906f3a65e2ac00e81d28b68eaa2fc605b7
Parent: acc591e
Committed by GitHub <noreply@github.com> on 10/30/2018, 2:06:08 PM