doc: Slightly correct advice on C/C++ linkage

The documentation was writing that <literal>extern C</literal> should
be used, but it should be <literal>extern "C"</literal>.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/794ba8b6a4c8ce409a37e84444c9519f7f1e5385

Modified Files
--------------
doc/src/sgml/xfunc.sgml | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

Reply via email to