Add bug fix note in whatsnew/v0.20.3.txt

Author: Pankaj Pandey

doc/source/whatsnew/v0.20.2.txt

@@ -53,6 +53,7 @@ Indexing
 I/O
 ^^^
 
+- Bug in skipping error lines with inline comments in space delimited text files (:issue:`16472`)
 - Bug that would force importing of the clipboard routines unnecessarily, potentially causing an import error on startup (:issue:`16288`)