hg: amber/amber: fallback to XXX::format if Formatter is needed

[vicente.romero at oracle.com]

Changeset: 01ead3d6c184
Author:    vromero
Date:      2019-04-02 16:45 -0400
URL:       http://hg.openjdk.java.net/amber/amber/rev/01ead3d6c184

fallback to XXX::format if Formatter is needed

! src/java.base/share/classes/java/lang/invoke/FormatterBootstraps.java