Rangers have yet to announce the signing of Oscar Cortes despite every media outlet reporting that it is a done deal. What we do know though, is the number that Gers boss Philippe Clement’s newest member of his squad will be wearing. According to Julian Capero of Colombian site Futbol Red, Rangers have already issued Oscar Cortes with his squad number and it is a familiar one. Rangers to give Oscar Cortes a familiar numberThe number ten shirt vacated by Steven Davis is available but it looks as though a former fans’ favourite will be seeing a new face in his shirt. Andy Halliday’s old number 1…