diffr $VERSION
Nathan Moreau <nathan.moreau@m4x.org>

diffr adds word-level diff on top of unified diffs.
word-level diff information is displayed using text attributes.

USAGE:
    diffr reads from standard input and writes to standard output.

    Typical usage is for interactive use of diff:
    diff -u <file1> <file2> | diffr
    git show | diffr

OPTIONS:
        --colors <COLOR_SPEC>...
            Configure color settings for console ouput.

            There are four faces to customize:
            +----------------+--------------+----------------+
            |  line prefix   |      +       |       -        |
            +----------------+--------------+----------------+
            | common segment |    added     |    removed     |
            | unique segment | refine-added | refine-removed |
            +----------------+--------------+----------------+

            The customization allows
            - to change the foreground or background color;
            - to set or unset the attributes 'bold', 'intense', 'underline';
            - to clear all attributes.

            Customization is done passing a color_spec argument.
            This flag may be provided multiple times.

            The syntax is the following:

            color_spec = face-name + ':' + attributes
            attributes = attribute
                       | attribute + ':' + attributes
            attribute  = ('foreground' | 'background') + ':' + color
                       | (<empty> | 'no') + font-flag
                       | 'none'
            font-flag  = 'italic'
                       | 'bold'
                       | 'intense'
                       | 'underline'
            color      = 'none'
                       | [0-255]
                       | [0-255] + ',' + [0-255] + ',' + [0-255]
                       | ('black', 'blue', 'green', 'red',
                          'cyan', 'magenta', 'yellow', 'white')

            For example, the color_spec

                'refine-added:background:blue:bold'

            sets the color of unique added segments with
            a blue background, written with a bold font.

        --line-numbers <compact|aligned>
            Display line numbers. Style is optional.
            When style = 'compact', take as little width as possible.
            When style = 'aligned', align to tab stops (useful if tab is used for indentation). [default: compact]

    -h, --help
            Prints help information

    -V, --version
            Prints version information