Update doc/user_guide/eels.rst

Co-authored-by: Jonas Lähnemann <[email protected]>

doc/user_guide/eels.rst

@@ -361,7 +361,7 @@ Therefore, we cannot model them from first-principles because i) the material is
 ii) HyperSpy only supports Hydrogenic and Hartree-Slater EELS core-loss models. Instead, the
 :py:class:`~._components.eels_cl_edge.EELSCLEdge` component includes features
 for EELS fine structure modelling and analysis using functions to mimic the fine structure
-features. The most basic consists on modelling
+features. The most basic consists in modelling
 the fine structure of ionization edges using a spline function. You can activate this feature
 by setting the :py:attr:`~._components.eels_cl_edge.EELSCLEdge.fine_structure_active` attribute
 of a given :py:class:`~._components.eels_cl_edge.EELSCLEdge` component to `True`. For example: