* t/03-language.t: adding some tests to check the code for the language
* t/02-weight.t: refactoring the test to use the last modification in the module
* t/03-language.t: correcting an error in one test
* lib/Biblio/Record/USBC.pm: first increment to pass the test
* lib/Biblio/Record/USBC.pm: refactoring of the 'computed_weight' method to use the length of the title to compute the weight and therefore computed weight