Exceptions: Delete exclamation marks as per code review

Author: echedey-ls

pvlib/spectrum/mismatch.py

@@ -354,11 +354,11 @@ def martin_ruiz_spectral_modifier(clearness_index, airmass_absolute,
             _params = MARTIN_RUIZ_PARAMS.loc[cell_type_lower]
         else:
             raise NotImplementedError('Cell type parameters not defined in '
-                                      'algorithm! Allowed types are '
+                                      'algorithm. Allowed types are '
                                       f'{tuple(MARTIN_RUIZ_PARAMS.index)}')
     elif cell_type is None and model_parameters is None:
         raise TypeError('You must pass at least "cell_type" '
-                        'or "model_parameters" as arguments!')
+                        'or "model_parameters" as arguments.')
     elif model_parameters is not None:  # Use user-defined model parameters
         # Validate 'model_parameters' sub-dicts keys
         if any([{'a', 'b', 'c'} != set(model_parameters[component].keys())
@@ -368,7 +368,7 @@ def martin_ruiz_spectral_modifier(clearness_index, airmass_absolute,
 
         _params = model_parameters
         if cell_type is not None:
-            warn('Both "cell_type" and "model_parameters" given! '
+            warn('Both "cell_type" and "model_parameters" given. '
                  'Using provided "model_parameters".')
 
     # Compute difference here to avoid recalculating inside loop

pvlib/tests/test_spectrum.py

@@ -303,7 +303,7 @@ def test_martin_ruiz_mm_userwarning(martin_ruiz_mismatch_data):
     model_parameters = martin_ruiz_mismatch_data['monosi_model_params_dict']
 
     with pytest.warns(UserWarning,
-                      match='Both "cell_type" and "model_parameters" given! '
+                      match='Both "cell_type" and "model_parameters" given. '
                             'Using provided "model_parameters".'):
         _ = spectrum.martin_ruiz_spectral_modifier(
             clearness_index,
@@ -318,7 +318,7 @@ def test_martin_ruiz_mm_error_notimplemented(martin_ruiz_mismatch_data):
     airmass_absolute = np.array(martin_ruiz_mismatch_data['airmass_absolute'])
 
     with pytest.raises(NotImplementedError,
-                       match='Cell type parameters not defined in algorithm!'):
+                       match='Cell type parameters not defined in algorithm.'):
         _ = spectrum.martin_ruiz_spectral_modifier(clearness_index,
                                                    airmass_absolute,
                                                    cell_type='')
@@ -331,7 +331,7 @@ def test_martin_ruiz_mm_error_missing_params(martin_ruiz_mismatch_data):
 
     with pytest.raises(TypeError,
                        match='You must pass at least "cell_type" '
-                             'or "model_parameters" as arguments!'):
+                             'or "model_parameters" as arguments.'):
         _ = spectrum.martin_ruiz_spectral_modifier(clearness_index,
                                                    airmass_absolute)