DefaultDiffStyle

is a low-level option for Diff and related functions that specifies the default styles to use when viewing changes.

Details

DefaultDiffStyleassoc can use the following keys to describe different elements of the diff result:

	"Added"	style for added elements
	"Changed"	style for changed elements
	"Conflict"	style for conflicts
	"NotChanged"	style for elements that have not changed
	"Removed"	style for removed elements

Color directives such as Red, as well as text specifications such as Bold or Small, can be given in place of options, just as in Style.
Using DiffStyle<|keyspec|> is effectively equivalent to replacing the diff elements specified by key with Style[diffelement,spec].
DefaultDiffStyle<||> introduces no default style specifications, leaving all elements effectively unstyled and visually indistinguishable from one another.
DiffStyle is applied after DefaultDiffStyle.

When DiffStyle is used, its settings are combined with the default diff styling:

DefaultDiffStyle directly overwrites default diff styling such as the background color:

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