Typos and inconsistent notation in `train`

[krzyzinskim]

There are typos and inconsistent notation in the print of the train function (with verbose = TRUE). In particular, this section caught my attention:

Data splitted and balanced 
Correct formats prepared 
Models sucsesfully trained 
Predicted Successfully 

• There is a dot in the first line, then there is none.
• sucsesfully -> successfully (the second usage of this word is with a capital letter)
• splitted -> split