The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.5/static/contrib-spi.html
Description:
In the appendix for Additional Supplied Modules there is a module spi. If
you click through the page for that module it never defines what spi is. If
you search for PostgreSQL spi you get the page that doesn't define it and
some other information on the PostgreSQL Server Programming Interface, which
I think is a different SPI. I would recommend that the module page define
the spi acronym.