- Do not turn "other accounts" into a comma-delimited string when the
report is constructed, but pass `AccountName`s up the chain. This
requires modifying the `AccountTransactionsReportItem` type to contain
`[AccountName]` rather than `Text`.
- Perform the account name summarization
(`Hledger.Data.AccountName.accountSummarizedName`) closer to the
actual rendering of the report, so that different report formats can
choose summarization strategy.
- Continue to summarize as before for terminal/text output (ie.
human-readable). Do not summarize any more for machine-readable output
(csv/html/fods).
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