just run `./configure.py --bootstrap`; for more details see HACKING.md.
(Also read that before making changes to Ninja, as it has advice.)
-Installation is not necessary because the only required file is is the
+Installation is not necessary because the only required file is the
resulting ninja binary. However, to enable features like Bash
completion and Emacs and Vim editing modes, some files in misc/ must be
copied to appropriate locations.