pgsql: doc: \copy can get data values \. and end-of-input confused

doc: \copy can get data values \. and end-of-input confused

Reported-by: Svante Richter

Discussion: /messages/by-id/fcd57e4-8f23-4c3e-a5db-2571d09208e2@beta.fastmail.com

Backpatch-through: 11

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/42d3125adae176cb7dcf7a4d896a78e615f6bbb4

Modified Files
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doc/src/sgml/ref/psql-ref.sgml | 4 ++++
src/bin/psql/copy.c | 2 ++
2 files changed, 6 insertions(+)