Keep backslash when autoformatting <<...\n" +>>
Keep backslash when autoformatting <<...\n" +>>

We do not have multiline string literals in Java yet, so
the code convention is that \n should be at the end of the line,
in other words, the newline inside the literal should be paired
with a newline outside of the literal.

Java's Matcher#replaceAll treats \ in the replacement a special way, so
literal \ in the replacement string should be coded as \\\\   ¯\_(ツ)_/¯

apache/calcite,looker-open-source/calcite,julianhyde/calcite,julianhyde/calcite,apache/calcite,julianhyde/calcite,julianhyde/calcite,looker-open-source/calcite,looker-open-source/calcite,julianhyde/calcite,apache/calcite,apache/calcite,looker-open-source/calcite,apache/calcite,julianhyde/calcite,apache/calcite,looker-open-source/calcite,looker-open-source/calcite