added a couple of setup docs tweaks

Author: AndrewGibbs

docs/guide/setup/octave.md

@@ -1,9 +1,10 @@
 # Octave installation
 
-For Octave compilation on Windows and Linux, you need the [LAPACKE](https://www.netlib.org/lapack/lapacke.html) library installed.
+## Windows and Linux
+For Octave compilation on Windows and Linux, you need the [LAPACK](https://www.netlib.org/lapack/), [LAPACKE](https://www.netlib.org/lapack/lapacke.html) and (BLAS)[https://www.netlib.org/blas/) libraries installed.
 
-
-When on MacOS, you must also make sure `openblas` [is installed](https://formulae.brew.sh/formula/openblas).
+## MacOS
+When on MacOS, you must make sure `openblas` [is installed](https://formulae.brew.sh/formula/openblas).
 
 Once installed, open the Mac terminal and type
 ```bash