Small typo in variable.c

[Daniel Westermann (DWE)]

Hi,

there is a typo in variable.c.
Attached a small fix for this.

Regards
Daniel
diff --git a/src/bin/psql/variables.c b/src/bin/psql/variables.c
index 92a34f870f..538b83ddd9 100644
--- a/src/bin/psql/variables.c
+++ b/src/bin/psql/variables.c
@@ -361,7 +361,7 @@ SetVariableHooks(VariableSpace space, const char *name,
 }
 
 /*
- * Return true iff the named variable has substitute and/or assign hook
+ * Return true if the named variable has substitute and/or assign hook
  * functions.
  */
 bool