RFR: 8256824: test/langtools/tools/javac/diags/examples/InnerClassCantHaveStatic.java has a bad copyright

[Kim Barrett]

Add missing comma in copyright text for test/langtools/tools/javac/diags/examples/InnerClassCantHaveStatic.java

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Commit messages:
 - fix copyright

Changes: https://git.openjdk.java.net/jdk/pull/1366/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1366&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256824
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1366.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1366/head:pull/1366

PR: https://git.openjdk.java.net/jdk/pull/1366