Update documentation

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@ -19,9 +19,9 @@ The preset dropdown allows you to choose from a hardcoded list of preloaded STV
| Cambridge STV | Rules in force in Cambridge, Massachusetts, using random sample transfers. These rules are derived from the [former chapter 54A of the Massachusetts General Laws](https://www.cambridgema.gov/-/media/Files/electioncommission/massachusettsgenerallawschapter54a.pdf), but have by regulation been modified to incorporate the procedures set out in Article IX of the former [1938 Charter of the City of Cincinnati](https://catalog.hathitrust.org/Record/001754258). See also [here](https://web.archive.org/web/20081118104049/http://www.fairvote.org/media/1993countmanual.pdf). | | ✓ |
| [Wright STV](https://www.aph.gov.au/Parliamentary_Business/Committees/House_of_Representatives_Committees?url=em/elect07/subs/sub051.1.pdf) | Rules proposed by Anthony van der Craats designed for computer counting, involving reset and re-iteration of the count after each candidate exclusion. | | ✓ |
| [PRSA 1977](https://www.prsa.org.au/rule1977.htm) | Simple rules designed for hand counting, using the exclusive Gregory method, with counting performed in thousandths of a vote. | | ✓ |
| [ERS97](https://www.electoral-reform.org.uk/latest-news-and-research/publications/how-to-conduct-an-election-by-the-single-transferable-vote-3rd-edition/) | More complex rules designed for hand counting, using the exclusive Gregory method. | | ✓ |
| • ERS76 | Former rules from the 1976 2nd edition. | [E6] | ✓ |
| • ERS73 | Former rules from the 1973 1st edition. | [E6] | |
| [ERS97](https://www.electoral-reform.org.uk/latest-news-and-research/publications/how-to-conduct-an-election-by-the-single-transferable-vote-3rd-edition/) | More complex rules designed for hand counting, using the exclusive Gregory method. | [E6] | ✓ |
| • ERS76 | Former rules from the 1976 2nd edition. | [E6] [E7] | ✓ |
| • ERS73 | Former rules from the 1973 1st edition. | [E6] [E7] | |
| Church of England | Rules from the Church of England [*Single Transferable Vote Rules 2020*](https://www.churchofengland.org/sites/default/files/2020-02/STV%20Rules%202020%20-%20final.pdf), similar to ERS73. | |
Exceptions:
@ -31,7 +31,8 @@ Exceptions:
* [E3] A tie between 2 candidates for the final vacancy will be broken backwards then at random, rather than the method described in the legislation.
* [E4] Bulk exclusion is not performed. See the section on *Bulk exclusion* for further discussion.
* [E5] The ‘mathematically eliminated by the sum of all ranked-choice votes comparison’ is not implemented.
* [E6] By default, the quota is always calculated to 2 decimal places. For full ERS76 (ERS73) compliance, set *Round quota to 0 d.p.* when the quota is more than 100 (100 or more).
* [E6] No distinction is made between stages and substages (during exclusion). This affects only the numbering of stages and not the result.
* [E7] By default, the quota is always calculated to 2 decimal places. For full ERS76 (ERS73) compliance, set *Round quota to 0 d.p.* when the quota is more than 100 (100 or more).
For details of validation, see [validation.md](validation.md).