GUACAMOLE-919: Whitespace fix

guacamole-docker/bin/start.sh

@@ -354,7 +354,7 @@ END
         "postgresql-default-max-group-connections-per-user" \
         "$POSTGRES_DEFAULT_MAX_GROUP_CONNECTIONS_PER_USER"
 
-    set_optional_property               \
+    set_optional_property                      \
         "postgresql-default-statement-timeout" \
         "$POSTGRES_DEFAULT_STATEMENT_TIMEOUT"
 
@@ -362,7 +362,7 @@ END
         "postgresql-user-required" \
         "$POSTGRES_USER_REQUIRED"
 
-    set_optional_property               \
+    set_optional_property           \
         "postgresql-socket-timeout" \
         "$POSTGRES_SOCKET_TIMEOUT"