Some corrections to the OLCI reader docstring.

satpy/readers/olci_nc.py

@@ -19,22 +19,28 @@
 
 This reader supports an optional argument to choose the 'engine' for reading
 OLCI netCDF4 files. By default, this reader uses the default xarray choice of
-engine, as defined in the `xarray open_dataset documentation`_. As an
-alternative, the user may wish to use the 'h5netcdf' engine, but that is
-not default as it typically prints many non-fatal but confusing error
-messages to the terminal.
-To choose between engines the user can  do as follows for the default:
+engine, as defined in the `xarray open_dataset documentation`_.
+
+As an alternative, the user may wish to use the 'h5netcdf' engine, but that is
+not default as it typically prints many non-fatal but confusing error messages
+to the terminal.
+To choose between engines the user can  do as follows for the default::
+
 scn = satpyScene(filenames=my_files, reader='olci_l1b')
-or as follows for the h5netcdf engine:
+
+or as follows for the h5netcdf engine::
+
 scn = Scene(filenames=my_files,
-reader='olci_l1b'), reader_kwargs={'engine': 'h5netcdf'})
+      reader='olci_l1b'), reader_kwargs={'engine': 'h5netcdf'})
+
 
 References:
     - `xarray open_dataset documentation`_
 .. _xarray open_dataset: http://xarray.pydata.org/en/stable/generated/xarray.open_dataset.html
 
 """
 
+
 import logging
 from datetime import datetime