DiffOptions

Option	Type	Default
inline	'none' | 'word' | 'character'	'word'
whitespace	'exact' | 'trailing' | 'surrounding' | 'amount' | 'all'	'exact'
ignoreCase	boolean	false
inlineThreshold	number	0.3
ignore	readonly RegExp[]	[]
maxCost	number	5000

DIFFINE_DEFAULTS is the same table as a value.

Option	Type	Default
inline	DiffInlineMode	DiffInlineMode.word
whitespace	DiffWhitespace	DiffWhitespace.exact
ignoreCase	bool	false
inlineThreshold	double	0.3
ignore	List<RegExp>	<RegExp>[]
maxCost	int	5000

DiffInlineMode is none, word or character; DiffWhitespace is exact, trailing, surrounding, amount or all. kDiffineDefaults is the same table as a value, and copyWith is how one option is changed without writing the rest.