Multiple, leading and trailing white spaces as well as wrong encodings may cause
serious problems in information dealing with taxonomic names.
The function 'clean_strings' get rid of them.
Usage
# S4 method for character
clean_strings(x, from="utf8", to="utf8")
# S4 method for factor
clean_strings(x, from="utf8", to="utf8")
# S4 method for data.frame
clean_strings(x, from="utf8", to="utf8")
This function automatically deletes leading, trailing and multiple white
spaces, either in strings (method 'character'), levels (method
'factor') or in single columns (method 'data.frame').