Update InstallationAndUsage.rst

Author: mcbarton

docs/source/InstallationAndUsage.rst

@@ -34,6 +34,7 @@ executing (replace `$CONDA_PREFIX` with a custom installation prefix if need be)
    cd build
    cmake .. -D CMAKE_PREFIX_PATH=$CONDA_PREFIX -D CMAKE_INSTALL_PREFIX=$CONDA_PREFIX -D CMAKE_INSTALL_LIBDIR=lib
    make check-xeus-cpp
+   make install
 
 and
 
@@ -42,11 +43,8 @@ and
    cd ../test
    pytest -sv test_xcpp_kernel.py
 
-to perform the python tests. After you have checked that the kernel passes all the tests, you can install it by executing
-
-.. code-block:: bash
-
-   make install
+to perform the python tests.
+   
 
 Installation within a mamba environment (wasm build instructions)
 ========================