sip: Caveats tell about sip-dir for Python 2.x and 3.x
rebar: --HEAD added
ninja-ide: 2.3 - Python IDE

NINJA-IDE (from: "Ninja Is Not Just Another IDE"),
is a cross-platform integrated development
environment specially designed to build Python
Applications. NINJA-IDE provides tools to simplify
the Python-software development and handles all
kinds of situations thanks to its rich extensibility.

Closes #21487

Signed-off-by: Samuel John <github@SamuelJohn.de>

Just added a test and fixed the python fsenvents dep.
re2 20130802

Closes #20597.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
rpm: make sure to not include var in the Cellar

Closes #21751.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mkvtomp4 1.2

Signed-off-by: Adam Vandenberg <flangy@gmail.com>