Review by Roberto (easier changes)
Remove package xfrac, rename variable
Merge branch 'master' of https://github.com/rodrigorgs/dapse13-bugpatterns
Revert "Merge branch 'master' of https://github.com/rodrigorgs/dapse13-bugpatterns"

This reverts commit 2d8ff4ff8dc95930ee27ab08c83555e747ae1b60, reversing
changes made to daed93aec1b104af6577a7d02706265e7e62202e.
Missing changes from Robert's review
Fix figure and tables.