hg: amber/amber: replace %% with % in the format string

[vicente.romero at oracle.com]

Changeset: 0996a11ae3e3
Author:    vromero
Date:      2019-02-19 21:20 -0500
URL:       http://hg.openjdk.java.net/amber/amber/rev/0996a11ae3e3

replace %% with % in the format string

! src/jdk.compiler/share/classes/com/sun/tools/javac/intrinsics/FormatterProcessor.java
! test/langtools/tools/javac/intrinsics/ConstantFormatStringTest.java < test/langtools/tools/javac/intrinsics/EmptyFormatStringTest.java