fix issue #975: last character not a `\n` after format in Intellij

[bodote]

Before this PR

WHEN creating a new java class using Intellij with palantir-java-format plugin enabled for formating all java files AND using maven-spotless with palantirJavaFormat AND the last line in a java file is not an empty line but just } with no \n appended THEN the mvn spotless:checkusing palantirJavaFormat fails BECAUSE the Intellij with palantir-java-format plugin enabled does NOT add this required \n

After this PR

fixes : https://github.com/palantir/palantir-java-format/issues/975

change PalantirJavaFormatFormattingService.java from request.onTextReady(formattedText); to request.onTextReady(formattedText.trim() + "\n"); so that the required \n is added when Intellij formats a source file

Possible downsides?

• none known

[palantirtech]

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Description fix https://github.com/palantir/palantir-java-format/issues/975

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