pgsql: Reword memory terminology for PQresultMemorySize

Reword memory terminology for PQresultMemorySize

Rather than using the generic word "space" we might as well use "memory"
since that's precisely what we're dealing with here.

This was extracted from a larger patch around terminology changes where
the remaining hunks were rejected.

Author: Gurjeet Singh <gurjeet@singh.im>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CABwTF4UHO_NtcsOL6_XZfnpKg_0XBFKa7B-7_x5zs3MRZm3-Tg@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/d8fd08efbc660788f9e735f9dda824c64bc9bd6b

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