Kurtis Rader b53f42970c correct handling of history args ...

This fixes several problems with how the builtin `history` command handles
arguments. It now complains and refuses to do anything if the user specifies
incompatible actions (e.g., `--search` and `--clear`). It also fixes a
regression introduced by previous changes with regard to invocations that
don't explicitly specify `--search` or a search term.

Enhances the history man page to clarify the behavior of various options.

This change is already far larger than I like so unit tests will be added
in a separate commit.

Fixes #3224.

Note: This fixes only a couple problems with the interactive `history
--delete` command in the `history` function. The main problem will be
dealt with via issue #31.

2016-07-20 21:18:48 -07:00

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