Add briefHangPoint modifier. This allows one to specify the command length
after which the rendering will change from aligned with the end of the
command name to being indented on the next line.

Add parserOptionGroup for grouping Options together, similar to command
groups. Requires the breaking change of adding the propGroup :: OptGroup
field to OptProperties.

Change pretty printer layout algorithm used.

The layoutSmart algorithm appears to be extremely slow with some command line
sets, to the point where the program appears to hang.

Fixes issues:

• # 476 - Stack executable 'hangs' with 0.17.1 and 0.18.0.

Render help text with AnsiStyle aware rendering functions.

Move to 'prettyprinter` library for pretty printing.

This is a potentially breaking change when one uses the '*Doc' family of functions
(like headerDoc) from Options.Applicative. However, as versions of
'ansi-wl-pprint > 1.0' export a compatible Doc type, this can be mitigated by
using a recent version.

One can also either import directly from Options.Applicative.Help or from the
Prettyprinter module of 'prettyprinter'.

Allow commands to be disambiguated in a similar manner to flags when the
disambiguate modifier is used.

This is a potentially breaking change as the internal CmdReader constructor
has been adapted so it is able to be inspected to a greater degree to support
finding prefix matches.

Widen bounds for ansi-wl-pprint. This supports the use of prettyprinter
in a non-breaking way, as the ansi-wl-pprint > 1.0 support the newer
library.

Export helpIndent from Options.Applicative.

Export completion script generators from Options.Applicative.BashCompletion.

Add simpleVersioner utility for adding a '--version' option to a parser.

Improve documentation.

Make tabulation width configurable in usage texts.

Separate program name and description in ParserHelp type.

Add helperWith function, which can be easily used to
localize the help flag.

Improve usage texts when command names are long.

Improve Documentation.

Guard process dependency behind an on by default flag. This allows one to shrink the dependency tree significantly by turning off the ability to use bash completion actions.

Remove bytestring dependency from the test suite.

Add Options.Applicative.NonEmpty.some1 function, which
parses options the same as some1 from base, but doesn't
cause duplicates in the usage texts.

Further improve help text generation in the presence
of optional values when nesting is involved, and many and
some when displayed with a suffix.

Add "global" options to the usage texts for subcommands.
When using subcommands, a "global options" section can
now appear below the options and commands sections.

Global options are off by default, to enable them, use
the helpShowGlobals modifier.

The noGlobal builder will suppress a single option being
displayed in the global options list.

Fixes issues:

• # 175 - List detailed subparser documentation with --help
• # 294 - Displaying global options when listing options for a command.
• # 359 - Subcommand help text lacks required parent command arguments

Allow the --help option to take the name of a command.
Usage without any arguments is the same, but now, when an
argument is given, if it is the name of a currently
reachable command, the help text for that command will
be show.

Fixes issues:

• # 379 - cmd --help subcmd is not the same as cmd subcmd --help

Updated dependency bounds.

Add builder for the all positional parser policy.

Remove deprecated functions

• nullOption
• execParserMaybe
• customExecParserMaybe

Add support for GHC 8.8.1.

Add subparserInline modifier as additional way of
executing subparsers. When activated, the subparser
parse tree will be inserted into that of the parent
instead of being run independently, allowing mixing
of child and parent options.

Improve rendering of complex nested parse structures.
Previously, brackets and parenthesis did not respect
whether or not options had to be defined together.
Now the parse tree is more accurately represeted in
the help text.

Add helpLongEquals modifier, which will change how
long options are printed in the help text, adding an
equals sign, for example "--input=FILE".

Updated dependency bounds.

Clean ups and Documentation.

Updated dependency bounds.

Fix tab completion with Commands being unreachable.

Clean ups and Documentation.