Update README

Escaped tags added in previous commit

README.md

@@ -458,7 +458,7 @@ future version.
 - Remove unwanted references from the text, and replace either by the "references_text" or by the reference content itself.
 - Unescape HTML special characters: `import html; html.unescape(my_text)`
 - Remove superfluous line break in text.
-- Remove XML tags / replace by special tokens (<italic>, <sup>, <sub>, ...).
+- Remove XML tags / replace by special tokens (\<italic\>, \<sup\>, \<sub\>, ...).
 - Join the items of the contents' lists.
 
 ## Additional Information