RND can now be called without parentheses (equivalent to RND(1)), matching real GW-BASIC behavior for legacy code compatibility. Update all Sphinx documentation pages to reflect features added in v0.6.0-0.8.0: DATE$/TIME$/TIMER, FILES/SHELL/CHDIR/MKDIR/RMDIR, AUTO/RENUM/DELETE, COMMON, LPRINT/LLIST with --lpt, --full TUI flag, dynamic screen buffer, 54 tests.