Simplified standard library; marked redundant filters as duplicated

[ghost]

See #418 for background discussion: quoting the gist of it here:

My suggestion is simple: functions that are identical save for an optional parameter (such as all functions that end with _by) could drop that prefix and become multi-arity functions

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• recurse takes over recurse_down and .., the former is deprecated.
• min and max take over min_by and max_by, which are deprecated.
• unique takes over unique_by, which is deprecated.
• sort takes over sort_by, which is deprecated.
• group replaces group_by, which is deprecated, for consistency.
• paths gains an optional argument, so that leaf_paths is the same as paths(values). The former is deprecated.
• range allows a one parameter invocation which assumes the range to start at zero.

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"Drop the _by. It's cleaner."

[ghost]

s/duplicated/deprecated (oops! :$)

[nicowilliams]

I rebased it, restored the missing recurse_down, massaged the manual a bit, and pushed it. Then I added some commits to get the manual to be a bit more consistent. Thanks!

[ghost]

Nice! Thank you. Also, sorry about recurse_down.

2014-06-18 1:23 GMT+02:00 Nico Williams notifications@github.com:

I rebased it, restored the missing recurse_down, massaged the manual a
bit, and pushed it. Then I added some commits to get the manual to be a bit
more consistent. Thanks!

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