FIXUP: grammar in a function doc comment

Author: cbandy

internal/controller/postgrescluster/postgres.go

@@ -41,8 +41,8 @@ import (
 	"github.com/crunchydata/postgres-operator/pkg/apis/postgres-operator.crunchydata.com/v1beta1"
 )
 
-// generatePostgresParameters produces a single parameter set that incorporates,
-// from highest to lowest precedence:
+// generatePostgresParameters produces the parameter set for cluster that
+// incorporates, from highest to lowest precedence:
 //  1. mandatory values determined by controllers
 //  2. parameters in cluster.spec.config.parameters
 //  3. parameters in cluster.spec.patroni.dynamicConfiguration