Development snapshot. PostgreSQL 20devel has not been released. Content may change.
Appendix I. The Source Code Repository
Table of Contents
The PostgreSQL source code is stored and managed using the Git version control system. A public mirror of the master repository is available; it is updated within a minute of any change to the master repository.
Our wiki, https://wiki.postgresql.org/wiki/Working_with_Git, has some discussion on working with Git.
Report a documentation issue
Read the upstream documentation. For corrections, first check the current manual.