Discussed at https://github.com/python/core-workflow/issues/32.

reported by Alexis Lopez-Garcia.

Mention that an ImportError is raised when exec_module() is defined, but
create_module() is not.

Patch by Aviv Palivoda.

Patch by Aviv Palivoda.

Add a reference to create_module(), in the first versionadded of section Loaders.

follow up of GH-162

Patch by Matthias Bussonnier.

* Fix small typos in introduction and datastructures
* Use iterable instead of L in the doc for list.extend

The Windows-specific subprocess.STARTUPINFO class now accepts
keyword-only arguments to its constructor to set the various
data attributes.

Patch by Subhendu Ghosh.

* bpo-16285: Update urllib quoting to RFC 3986

urllib.parse.quote is now based on RFC 3986, and hence
includes `'~'` in the set of characters that is not escaped
by default.

Patch by Christian Theune and Ratnadeep Debnath.

When checking for the default X web browser, xdg-settings
may emit messages on stderr if some components (such as
kreadconfig5) are unavailable. These messages aren't of
interest to Python, so we just ignore them.

- Add 'preferred' argument to webbrowser.register
- Use xdg-settings to specify preferred X browser

The first change replaces the existing undocumented tri-state
'try_order' parameter with the documented boolean keyword-only
'preferred' parameter. Setting it to True places the browser at the
front of the list, preferring it as the return to a subsequent get() call.

The second change adds a private `_os_preferred_browser` setting
and then uses that to make the default browser reported by
`xdg-settings` first in the try list when running under X (or
another environment that sets the `DISPLAY` variable).
This avoids the problem where the first entry in the tryorder
queue otherwise defaults to xdg-open, which doesn't support
the "new window" option.

mention bpo-28929 in the Documentation section of
What's New in Python 3.7.0 alpha 1

* bpo-25008: Deprecate smtpd and point to aiosmtpd.

* Simplify the aiosmtpd URL.

Was bumped in the docstring by b9f4feab
but not in `__version__`

bpo-29463 added optional "docstring" field to 4 AST types.
While it is optional, it breaks backward compatibility because AST constructor
requires number of positional argument is same to number of fields.

AST types accepts empty arguments, and incomplete keyword arguments.
But it's not big problem because field can be filled after creation, and checked when compiling.
So stop requiring complete set of fields for positional arguments too.

Add a comment to prevent further attempts to avoid a copy for
optimization.