unix/dev: Enable MICROPY_ENABLE_FUNCTION_DOC_STRING.
#define MICROPY_ENABLE_PRECISE_SOURCE_LINE (1)
#define MICROPY_FLOAT_HIGH_QUALITY_HASH (1)
#define MICROPY_ENABLE_DOC_STRING (1)
+#define MICROPY_ENABLE_FUNCTION_DOC_STRING (1)
#define MICROPY_ENABLE_SCHEDULER (1)
#define MICROPY_IMPORT_HOOK (1)
#define MICROPY_READER_VFS (1)
