fix typos

content/install.rst

@@ -227,7 +227,7 @@ dependencies so that you can use the `IPython notebook <http://ipython.org/noteb
 
 Kwant currently has ``conda`` packages for GNU/Linux and Mac OS X platforms.
 
-1. Download the Python 3.6 verision of `Anaconda <https://www.continuum.io/downloads>`_ for
+1. Download the Python 3.6 version of `Anaconda <https://www.continuum.io/downloads>`_ for
    your platform and install it.
 
 2. Execute the following command in a terminal::
@@ -258,7 +258,7 @@ packages from the `Python package index <https://pypi.python.org/>`_.
 1. Install the non-Python dependencies of Kwant: a C compiler, BLAS, Lapack,
    and (optionally) MUMPS (see `Installing non-Python dependencies`_).
 
-2. Execure the following command in a terminal::
+2. Execute the following command in a terminal::
 
     sudo pip3 install kwant