I sent this already a few hours ago but it got blocked because I had not yet joined the mailing list. Trying again, sorry for any redundancy or confusion!
This is to fix an issue that came up for me when running initdb.
At the end of a successful initdb it says:
Success. You can now start the database server using: pg_ctl -D /some/path/to/data -l logfile start
but this command did not work for me because my data directory contained a space. The src/bin/initdb/initdb.c source code did already have a QUOTE_PATH constant, but it was the empty string for non-windows cases.
Therefore, added quotes via existing QUOTE_PATH constant: