disko: strip new lines from key files

modules/disko.nix

@@ -108,8 +108,8 @@ in
                     {
                       type = "luks";
                       name = luksName;
-                      # TODO: add password, otherwise prompt opens
-                      keyFile = "/$PWD/keyFile";
+                      # trim potential new lines to not have them in the password
+                      keyFile = "tr -d '\n' </$PWD/keyFile";
                       content = {
                         type = "lvm_pv";
                         vg = vgName;