Обсуждение: pgsql: Use single quotes in preference to double quotes for protecting

Use single quotes in preference to double quotes for protecting pathnames.

Per recommendation from Peter.  Neither choice is bulletproof, but this
is the existing style and it does help prevent unexpected environment
variable substitution.

Branch
------
REL9_1_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/a969a2f03041cd33bc9f9f75f0b6a1c0f5b921e2

Modified Files
--------------
src/Makefile.global.in            |    4 ++--
src/Makefile.shlib                |    2 +-
src/backend/Makefile              |   20 ++++++++++----------
src/interfaces/ecpg/test/Makefile |    6 +++---
src/makefiles/Makefile.aix        |    4 ++--
src/test/isolation/Makefile       |    2 +-
6 files changed, 19 insertions(+), 19 deletions(-)