pgsql: doc: remove mention of backslash doubling in strings

doc: remove mention of backslash doubling in strings

Reported-by: Laurenz Albe

Discussion: /messages/by-id/0b03f91a875fb44182f5bed9e1d404ed6d138066.camel@cybertec.at

Author: Laurenz Albe

Backpatch-through: 11

Branch
------
REL_11_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/0aeadb4f7974189ca057830f8c0e424f70e4cf70

Modified Files
--------------
doc/src/sgml/syntax.sgml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)