Improve answer preprocessing

[jeroenheijmans]

An example bug that may occur in for example language answers preprocessing:

• Answer is "Rockstar (just one day, to see if I could)"
• Because there are several answers like "Java, Scala, Clojure" since 2018 a preprocessor was created to split this type of "Other..." answer into multiples
• Result is that the answer is split awkardly in 2 items

This is a bug that can possibly occur (and possibly be solved) for previous years too.

Related: #5

[jeroenheijmans]

Will be fixed in the 2022 results!