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Fix sine -> since typo in HardwareSerial files

* Interrupt ordering for 32u2 and 16u2 MCU
* Added missing chip variants

Port of https://github.com/arduino/Arduino/pull/7023

Remove Genuino Occurrences

Revert "Changed linking order, so precompiled libraries can be used"

This reverts commit 41f15a13.

No fixed value for USB power current.

* Changed linking order, so precompiled libraries can use the Arduino code functions.
* Added 'compiler.libraries.ldflags', reverted object order in previous commit

Minor optimization in shiftOut function

Cast pins to signed integers to avoid Wtype-limits compile warning

Do not claim AT-protocol in CDC interface descriptor

Correct yunmini.bootloader.file on boards.txt

[TWI] Add __attribute__ ((fallthrough)) to remove recent GCC warnings

Add `bitToggle` macro to complement `bitSet` etc

Add placement new operator

Add parameter names to common prototypes

Adding parenthesis around 'bitvalue' allowing correct macro expansion when using with ternary operator such as bitWrite(value, bit, some_computed_value == 5 ? 1: 0);'

Fix unused variable warning for non-pluggable USB in SendDescriptor

Removes unnecessary if branch (because length is checked in while statement below the if-clause).

checking `length` in below while statement

Added  __attribute__ ((fallthrough));

The CDC code presents itself as a virtual serial port. However, it also
sets the "bFunctionProtocol" value to 1, which means it supports
AT-commands, which is not actually the case. This might cause problems
with some software, such as ModemManager.

Originally, ModemManager would be very liberal with probing serial
devices, using a blacklist to prevent probing non-modems such as
Arduinos.

Since version 1.7.990, it has supported a "strict" mode where it tries to be
more restrained in what devices it probes. For CDC ACM devices, this
means it will only probe devices that claim to support AT-commands.
However, it also stopped applying the blacklist (intending to eventually
remove the blacklist), meaning it would again probe Arduinos.

This new strict policy is not the upstream default, but is enabled in
Debian (since Buster) and Ubuntu (since bionic 18.04.2).

The proper way to fix this, is to not claim AT comand support in the USB
device descriptor, which is what this commit does. The Arduino will
still show up as a virtual serial port, just not be probed by
ModemManager in strict mode.

For the commit that introduced the strict mode in ModemManager, see
https://cgit.freedesktop.org/ModemManager/ModemManager/commit/src?id=ee570d44dc117dc69f23e83313dd877f76c5e3e0

Remove historic Arduino 0012 workaround in SoftwareSerial

Avoids unused variable warning if USB is enabled but pluggable USB is not

Putting the parameter names in these commonly used prototypes makes syntax help like VS Code's Intellisense work 99% more useful. Without them, it doesn't give you the names of the parameters and you have to remember the semantics yourself. :(

Remove commented out code for I2C interrupts on WInterrupts.c

These are currently implemented by the Wire library, on twi.c

Add USBDevice.isSuspended()