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-rw-r--r--doc/src/sgml/regress.sgml2
-rw-r--r--src/test/regress/pg_regress.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/doc/src/sgml/regress.sgml b/doc/src/sgml/regress.sgml
index 673a8c21642..749d1a384bb 100644
--- a/doc/src/sgml/regress.sgml
+++ b/doc/src/sgml/regress.sgml
@@ -410,7 +410,7 @@ make standbycheck
If you don't
like the <command>diff</command> options that are used by default, set the
environment variable <envar>PG_REGRESS_DIFF_OPTS</envar>, for
- instance <literal>PG_REGRESS_DIFF_OPTS='-u'</literal>. (Or you
+ instance <literal>PG_REGRESS_DIFF_OPTS='-c'</literal>. (Or you
can run <command>diff</command> yourself, if you prefer.)
</para>
diff --git a/src/test/regress/pg_regress.c b/src/test/regress/pg_regress.c
index 3c360d16352..d4f04a8a2c6 100644
--- a/src/test/regress/pg_regress.c
+++ b/src/test/regress/pg_regress.c
@@ -62,10 +62,10 @@ static char *shellprog = SHELLPROG;
*/
#ifndef WIN32
const char *basic_diff_opts = "";
-const char *pretty_diff_opts = "-C3";
+const char *pretty_diff_opts = "-U3";
#else
const char *basic_diff_opts = "-w";
-const char *pretty_diff_opts = "-w -C3";
+const char *pretty_diff_opts = "-w -U3";
#endif
/* options settable from command line */