Updated Comparison to Excel documentation with examples of reading Excel file, and fixed typo via pandas-dev#38990

Author: bsun94

doc/source/getting_started/comparison/comparison_with_spreadsheets.rst

@@ -135,7 +135,7 @@ Should you wish to subsequently access the data in the ``tips.xlsx`` file, you c
 
 .. code-block:: python
 
-    tips_df = read_excel("./tips.xlsx", header=None)
+    tips_df = pd.read_excel("./tips.xlsx", header=None)
 
 You have just read in an Excel file using pandas!