Hyrule

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Removals
------------------------------
* `defn/a+` has been removed. Use `(defn+ :async …)` instead.
* `fn/a+` has been removed. Use `(fn+ :async …)` instead.
* `profile/calls` has been removed. Use `pycallgraph2` or
`python-call-graph`, which are available on PyPI, instead.
* `profile/cpu` has been removed. Use `(with [pr (cProfile.Profile)]
…)` instead.

Other Breaking Changes
------------------------------
* `(with-gensyms [a b c] …)` is now written `(def-gensyms a b c) …`.
* The names of gensyms produced by `import-path` have changed. (This
shouldn't break your code unless you're doing something
exceptionally weird, but the argument to `hy.gensym` was documented,
so this is technically a breaking change.)

Bug Fixes
------------------------------
* A lot of incompatibilities of `meth`, `ameth`, `defn+`, and `fn+`
with the core `defn` and `fn` have been fixed. You can now use `:async`,
docstrings are recognized properly, etc.
* `defmacro!` no longer crashes when mutating macro arguments.
* `match-fn-params` now handles `None` correctly.

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Removals
------------------------------
* `walk`, `prewalk`, and `postwalk` have been removed. Use `map-model` and
`map-hyseq` instead.

Breaking Changes
------------------------------
* `recur` is now a real object that must be imported from Hyrule when
using `loop`.
* `macroexpand-all` now uses the same parameters as `hy.macroexpand`.
* `lif` now treats `False` as false.

New Features
------------------------------
* New macro `pun`.
* New macro `map-hyseq`.
* `loop` allows more kinds of parameters.
* `assoc` allows keyword arguments.
* `flatten`, given a non-collection, returns it as a singleton list,
instead of raising an error.

Bug Fixes
------------------------------
* `map-model` now calls `as-model` only once (before its own recursion),
and it does so unconditionally.
* `loop` now works when nested.
* `macroexpand-all` no longer crashes on stub macros.
* `macroexpand-all` now recognizes macro names properly.
* `lif` now works when renamed, or when invoked with `hy.R`.

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New Features
------------------------------
* New macros `meth` and `ameth`.

Bug Fixes
------------------------------
* `match-fn-params` now raises an error for syntactically invalid
parameter lists.

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Removals
------------------------------
* `defmacro/g!` has been removed. Use `defmacro!` instead.

Other Breaking Changes
------------------------------
* `cut` on a `Sequence` now returns another `Sequence`, not a generator.
* `assoc` is now a function rather than a macro. Its effect is unchanged.

New Features
------------------------------
* The `Sequence` constructor now accepts an arbitrary iterable.
* New macro `defmacro-kwargs`.
* New macro `parse-fn-params`.
* New macro `some->`.
* New function `import-path`.
* New function `sign`.
* New function `thru`.

Bug Fixes
------------------------------
* `defmacro!` now properly handles explicit return statements
within its macro definition.
* Various `Sequence` bugs have been fixed.
* `assoc` no longer requires a second and third argument.

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No user-visible changes beyond compatibility with new Hy versions.

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New Features
------------------------------
* `do-n` and `list-n` now allow the count to be `Inf`.
* New reader macro `/` that wraps `hy.M` for easy imports in macros.

Bug Fixes
------------------------------
* `seq` and `defseq` no longer crash if `Sequence` is not imported.
* `->`, `->>`, and `doto` now properly handle bare symbols with leading dot.