Eero Vaher

Making analytic potentials time dependent

8

**Is your feature request related to a problem? Please describe.** The ability to create time dependent analytic potentials would be helpful for running N-body simulations, as it would allow to...

Enable formatting `Quantity` units through string format specification

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### Description This pull request enables using unit format names as string format specifiers for `Quantity` objects, e.g. ```python >>> from astropy import units as u >>> f'{1*u.m/u.s:latex_inline}' '$1 \\;...

Implement a `help()` method for the configuration system

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`ConfigItem` instances have a `description` attribute, the contents of which are written to the configuration file as comments. However, there is currently no convenient way of accessing the `description` strings...

Improve file signature detection in `astropy.utils.data.get_readable_fileobj()`

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### Description Currently `astropy.utils.data.get_readable_fileobj()` checks the file signature of a non-random access file-like object (i.e. one that does not have a `seek()` method) by reading in *all* its contents to...

Fix changing `simbad` config items at runtime

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Previously changing `simbad` config items at runtime had no effect. Now the config items are read when they are needed, unless the user has specified the corresponding class or instance...

Update handling configuration items in template

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Three updates have been made to the subpackage template. 1) It now recommends implementing private properties so that it would be possible to use the `astropy` configuration system at runtime,...

Make it easier to change Gaia row limit

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The first commit of this pull request adds the `row_limit` argument to the `query_object` and `cone_search` families of functions in the Gaia module. It also ensures that the row limit...

Use `np.random.default_rng()` in code examples

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### Description [The recommended way of generating random numbers in `numpy` is through `np.random.default_rng()`](https://numpy.org/doc/stable/reference/random/index.html#quick-start). All code examples in the narrative documentation now follow this recommendation. That `default_rng()` is now indeed...

Address Ruff rule PLR0911 in `io`

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### Description [PLR0911](https://docs.astral.sh/ruff/rules/too-many-return-statements/) guards against functions with very many return statements. The three functions in `astropy.io` violating that rule (which all happened to be in `io.fits`) have been updated. Two...

Deprecate `utils.xml.unescaper.unescape_all()`

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### Description The function has been unused since 4ef6c24b186694658be2300f16ea1a5b1c038eb2. [It is a part of the public API](https://docs.astropy.org/en/stable/api/astropy.utils.xml.unescaper.unescape_all.html#astropy.utils.xml.unescaper.unescape_all), so we cannot remove it immediately. - [x] By checking this box, the...