Tilde replacement is incorrect

[schlessera]

The "tilde to HOME" replacement seems incorrect:

path-util/src/Path.php

Line 97 in d939f7e

if ('~' === $path[0]) {

If you are user_a and you type ~user_b, this would be replaced by the shell to mean /home/user_b. The current code will replace this to /home/user_auser_b instead.