Fellegi sunter topic guide

[RossKen]

Type of PR

• BUG
• FEAT
• MAINT
• DOC

Is your Pull Request linked to an existing Issue or Pull Request?

Give a brief description for the solution you have provided

PR Checklist

• Added documentation for changes
• Added feature to example notebooks at tutorials in splink_demos (if appropriate)
• Added tests (if appropriate)
• Made changes based off the latest version of Splink
• Run the linter

[github-actions]

Test: test_2_rounds_1k_duckdb

Percentage change: -12.9%

	date	time	stats_mean	stats_min	commit_info_branch	commit_info_id	machine_info_cpu_brand_raw	machine_info_cpu_hz_actual_friendly	commit_hash
849	2022-07-12	18:40:05	1.89098	1.87463	splink3	c334bb9	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	2.7934 GHz	c334bb9
1716	2023-06-11	20:46:15	1.64856	1.63319	(detached head)	057fa3a	Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz	2.2947 GHz	057fa3a

Test: test_2_rounds_1k_sqlite

Percentage change: -4.3%

	date	time	stats_mean	stats_min	commit_info_branch	commit_info_id	machine_info_cpu_brand_raw	machine_info_cpu_hz_actual_friendly	commit_hash
851	2022-07-12	18:40:05	4.32179	4.25898	splink3	c334bb9	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	2.7934 GHz	c334bb9
1718	2023-06-11	20:46:15	4.09874	4.07527	(detached head)	057fa3a	Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz	2.2947 GHz	057fa3a

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