Replaces the partial HashMap.! with List.elemIndex.
(Although the HashMap is more algorithmically efficient,
its API changed recently, possibly complicating building,
and efficiency is just not going to be an issue here.)
This is an API change, but it seems better than having additional
colour-supporting variants and trying to avoid duplicated code.
I stopped short of changing showAmount, so cshowAmount still exists.
Renamed: writeValidJournal -> writeJournalTextIfValidAndChanged
Added comments clarifying line ending behaviour of:
add, import, appendToJournalFileOrStdout, readFilePortably,
writeFileWithBackupIfChanged, writeJournalTextIfValidAndChanged
Summary of current behaviour:
- hledger add and import commands will append with (at least some)
unix line endings, possibly causing the file to have mixed line
endings
- hledger-web edit and upload forms will write the file with
the current system's native line endings, ie changing all
line endings if the file previously used foreign line endings.
