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fcbbf82d2b
Commit d5563d7df9 drew complaints from Coverity, which quite
correctly complained that one copy of each -c or -f string was being
leaked. What's more, simple_action_list_append was allocating enough space
for still a third copy of each string as part of the SimpleActionListCell,
even though that coding method had been superseded by a separate strdup
operation. There were some other minor coding infelicities too. The
documentation needed more work as well, eg it forgot to explain that -c
causes psql not to accept any interactive input.