Improve report context formatting
Improve report context formatting

------------------------------------------------------------------------------------------------------------------------
redundant_indices / 0004_id_foo_bar

	KEY idx_foo (foo) index can be removed as redundant (covered by KEY idx_foo_bar (foo, bar))

	- table_data_size_mb: 0.015625
	- redundant: KEY idx_foo (foo)
	- schema: CREATE TABLE `0004_id_foo_bar` (
	    `id` int(9) NOT NULL AUTO_INCREMENT,
	    `foo` varbinary(16) NOT NULL DEFAULT '',
	    `bar` varbinary(16) NOT NULL DEFAULT '',
	    PRIMARY KEY (`id`),
	    KEY `idx_foo` (`foo`),
	    KEY `idx_foo_bar` (`foo`,`bar`),
	    KEY `idx_id_foo` (`id`,`foo`)
	  ) ENGINE=InnoDB DEFAULT CHARSET=latin1
	- table_index_size_mb: 0.046875
	- covered_by: KEY idx_foo_bar (foo, bar)
------------------------------------------------------------------------------------------------------------------------

macbre/index-digest,macbre/index-digest