RFR - JDK-8215493 String::indent inconsistency with blank lines

[Jim Laskey]

Please review these changes for jdk 12.

webrev: http://cr.openjdk.java.net/~jlaskey/8215493/webrev/index.html <http://cr.openjdk.java.net/~jlaskey/8215493/webrev/index.html>

There is inconsistency with regards to blank lines and indentation. Adding indent space ignores blank lines, where subtraction indentation white space does not ignore blank lines. The solution is to remove the condition "Blank lines are unaffected" from the specification with appropriate changes to the implementation.

Thank you.

Cheers,

— Jim

CSR: https://bugs.openjdk.java.net/browse/JDK-8215499 <https://bugs.openjdk.java.net/browse/JDK-8215499>
JBS: https://bugs.openjdk.java.net/browse/JDK-8215493 <https://bugs.openjdk.java.net/browse/JDK-8215493>