Test coverage for excel.py

Author: l0g0idz

pandas/io/formats/excel.py

@@ -566,7 +566,7 @@ def __init__(
         if cols is not None:
             # all missing, raise
             if not len(Index(cols).intersection(df.columns)):
-                raise KeyError("passes columns are not ALL present dataframe")
+                raise KeyError("Passed columns are not ALL present dataframe")
 
             if len(Index(cols).intersection(df.columns)) != len(set(cols)):
                 # Deprecated in GH#17295, enforced in 1.0.0