Hypercube generation - Blank spaces at the start and end of password are disregarded

[keomabrun]

Original issue by @Zeriuno: labriqueinternet/labriqueinter.net#71

What happens
When creating a hypercube, if the password field starts or end with a blank space, the blank space will be removed from the hypercube file

What should happen
Linux accepts blank spaces (at the start of the password, at the end, at the middle.
Blank spaces should not be stripped by the hypercube generator.