* gnu/system/uuid.scm (%fat32-uuid-rx): New variable. (string->fat32-uuid): New procedure. (%uuid-parsers): Add it. * tests/uuid.scm ("uuid, FAT32, format preserved"): New test.
* tests/file-systems.scm ("uuid->string", "string->uuid") ("uuid", "uuid, syntax error"): Move to... * tests/uuid.scm: ... here. New file. ("uuid, ISO-9660, format preserved"): New test.