hg: jdk/sandbox: 8176379: java.util.Base64 mime encoder behaves incorrectly if initialized with a line length of size 1-3

[chris.hegarty at oracle.com]

Changeset: e704f48d8277
Author:    sherman
Date:      2018-01-31 10:34 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e704f48d8277

8176379: java.util.Base64 mime encoder behaves incorrectly if initialized with a line length of size 1-3
Reviewed-by: rriggs, alanb, psandoz

! src/java.base/share/classes/java/util/Base64.java
! test/jdk/java/util/Base64/Base64GetEncoderTest.java
! test/jdk/java/util/Base64/TestBase64.java