Update pvsystem.py

Author: echedey-ls

pvlib/pvsystem.py

@@ -2064,7 +2064,7 @@ def retrieve_sam(name=None, path=None):
     # using the latest CEC Inverter database, via URL
     >>> inv_db = pvsystem.retrieve_sam(path="https://raw.githubusercontent.com/NREL/SAM/refs/heads/develop/deploy/libraries/CEC%20Inverters.csv")
     >>> inv_db.keys()
-    Index(['ABB__PVI_3_0_OUTD_S_US_A__208V_', 'ABB__PVI_3_0_OUTD_S_US_A__240V_', ...],          
+    Index(['ABB__PVI_3_0_OUTD_S_US_A__208V_', 'ABB__PVI_3_0_OUTD_S_US_A__240V_', ...],
           dtype='object', length=...)
     """  # noqa: E501
     # error: path was previously silently ignored if name was given GH#2018