create_table force option drops table when if_not_exists option is present

[allisonphillips]

The problem is here:

rails/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

Lines 293 to 300 in 36c1591

	def create_table(table_name, id: :primary_key, primary_key: nil, force: nil, **options, &block)
	validate_create_table_options!(options)
	validate_table_length!(table_name) unless options[:_uses_legacy_table_name]
	td = build_create_table_definition(table_name, id: id, primary_key: primary_key, force: force, **options, &block)
	if force
	drop_table(table_name, force: force, if_exists: true)
	else

I can't submit this from my work computer, but can somebody put up a PR to make this change to L299:

drop_table(table_name, force: force, if_exists: true) unless td.if_not_exists

Edge case where this occurs:
Adding guarded migrations to make migration schema consistent with schema dump for DB that has migrations applied to it that are not in the schema history.
If you copy the table definition from the schema dump and add the if_not_exists, running the migration will drop the table if it exists