Fix several grammar typos in the setup docs
@@ -4,8 +4,8 @@ Setup & Dependencies
The primary goal is to keep the dependencies for the `core` package as small
as possible. The add-ons are not part of the core package and can therefore
-use as much packages as needed. The only requirement for this packages is an
-easy way to install them on Windows, Linux and macOS, preferred as
+use as many packages as needed. The only requirement for these packages is an
+easy way to install them on Windows, Linux and macOS, preferably as
``pip3 install ...``.
The ``pyparsing`` package is the only hard dependency and will be installed
