Upgrade to Checkstyle 6.16.1

Release 6.16.1

Bug fixes:

    fix TokenTypes compatibility problems between 6.15 and 6.16. Author: rnveach #2997
    Allow JUnit ClassRule to be public. Author: Andrej Vano #2987
    FinalParameters should not warn for non-final parameters of native methods . Author: rnveach #2981

Notes:

    Revert "Issue #2973: removed unused FLOAT_SUFFIX from java.g". Author: Roman Ivanov
    all rows in coerage table google_style.html shoudl have anchor. Author: rnveach #2975
    Strive for 100% line coverage for java grammar. Author: rnveach #2973

Release 6.16

Breaking backward compatibility:

    Move Treewalker cache to Checker. Author: Andrei Selkin #569

New:

    Make CLI option to be able to print Javadoc tree as plain text. Author: Baratali Izmailov #652
    copy Check class to AbstractCheck class to let deprecate Check class. Author: rnveach, Roman Ivanov #2551
    Print parse tree from CLI to terminal. Author: Vladislav Lisetskiy #2638

Bug fixes:

    Skip type annotations from validation of ModifierOrderCheck. Author: Andrei Selkin #903
    Probable typo in com.puppycrawl.tools.checkstyle.checks.blocks.RightCurlyCheck. Author: Andrei Selkin #2762
    Indentation check reports some incorrect indentation levels on errors. Author: rnveach #2941
    6.15 complains about missing @return tag in a overridden method. Author: Vladislav Lisetskiy #2869
    Nesting Checks in each other in config does not produce any error. Author: rnveach #2773
    Forbid multiple violation for the same line in IndentaitonCheck. Author: liscju #676
    LeftCurly not working correctly with lambdas. Author: liscju #2818
    Duplicate error message for static final field in DeclarationOrder check. Author: liscju #1048
    Translation Check: wrong support for resources with language, country, variant. Author: Andrei Selkin #2251
    Checkstyle internal exceptions lack contextual information. Author: Andrei Selkin #2285
    Changed semantics of PropertyExpander. Author: Petr Hejl #2886
    Indentation properties not applied properly to lambdas. Author: rnveach #281
    VisibilityModifier.allowPublicImmutableFields should allow public immutable fields in enums. Author: Vladislav Lisetskiy #2887
    FinalClass is over aggressive when extending happen inside class. Author: liscju #2822
    WhitespaceAround should have an option allow double-brace initialization. Author: liscju #2838
    Exception when using method reference in lamba "Class<?>[]::new". Author: Ilja Dubinin #2729
    Wasted disk access. Author: rnveach #2103
    JavadocType doesn't report unused param tag. Author: liscju #2811
    DeclarationOrder check enforces order that is not possible. Author: Andrei Selkin #924
    Tabs are wrongly handled in Indentation check when line is wrapped. Author: rnveach #2795
    custom javadoc inline tags cause parse error. Author: rnveach #1184
    JavadocStyleCheck: String index out of range: -1. Author: rnveach #2788

Notes:

    Strive for 100% line coverage for java grammar. Author: rnveach #2973
    Refactor Comments AST Test. Author: rnveach #2396
    doc: example to checkstyle's Ant configuration was added to anttask.html. Author: Roman Ivanov
    Travis: add xwiki project to regeression testing. Author: Vladislav Lisetskiy #2938
    PMD: resolve problems from DefaultPackage rule. Author: Vladislav Lisetskiy, Roman Ivanov #957
    doc: Improve javadoc of parameters of AnnotationLocationCheck.. Author: liscju
    fix java8 compilation broblems in Inputs. Author: rnveach #2904
    Create web-page with instructions: how to create Javadoc Check. Author: Baratali Izmailov #410
    PMD ExceptionAsFlowControl: Do not use exceptions as flow control to create objects in PackageObjectFactory. Author: Vladislav Lisetskiy #1159
    ant with failOnViolation="false" will FAIL. Author: Vladislav Lisetskiy #2185
    Checkstyle cannot be built using JDK9 as tools.jar has been dropped . Author: Peter Wong #2905
    CS' java 8 code isn't compilable. Author: rnveach #2880
    doc: NPath documentation is extended. Author: Roman Ivanov
    Refactor gui package. Author: Vladislav Lisetskiy #2609
    spelling: Correct spelling for fast-forward-merge.sh. Author: Thomas Paul Mann
    UTs should be launched in default locale. Author: Vladislav Lisetskiy #2783
    Disallow usage of java.util.Stack and java.util.Vector in code. Author: Andrei Selkin #2859

Release 6.15

New:

    new Check: RegexpOnFilename. Author: rnveach, Roman Ivanov #2546
    SuppressionFilter: new option 'optional' to allow skip SuppressionFilter if config file does not exist. Author: liscju #1002
    Add possibility to specify a unique ID to all Regexp checks. Author: Andrei Selkin #1008

Bug fixes:

    StringIndexOutOfBoundsException in Indentation check. Author: rnveach #2645
    AbstractJavadocCheck should process only doc comments placed before class, interface, constructor, method, or field declarations. Author: Baratali Izmailov #325
    SummaryJavadoc: false "end with a period" reports when inheritDoc is used . Author: rnveach #2805
    JavadocMethod: allowedAnnotations hides bad javadocs. Author: rnveach #2806
    FinalLocalVariable doesn't report variable when condition separates 2 assignments. Author: Bhavik Patel #2807
    Config of Google Style does not include InterfaceTypeParameterName check. Author: Andrei Selkin #2792
    Indentation on annotation parameters is wrong. Author: liscju #1349
    OneStatementPerLine check and lambda expression. Author: liscju #2688
    Gui should have a splitter bettween tree and code and prefered columns size. Author: liscju #2767
    RequireThis reports false-positive when an instance method is overloaded with a static one. Author: Vladislav Lisetskiy #2539

Notes:

    Add checkstyle messages to xdocs. Author: rnveach #2836
    Setup 'Circle CI' to run checkstyle-tester project on JDK sources. Author: Vladislav Lisetskiy, Roman Ivanov #2815
    Enforce Checks of sevntu.checkstyle (released version) over Checkstyle source code. Author: Yasser Aziza #2661
    Use Codeship CI for testing. Author: Roman Ivanov #2727
    Refactor gui package. Author: Vladislav Lisetskiy, Roman Ivanov #2609
    doc: Add sbt-checkstyle-plugin to list of active tools. Author: Andrew Johnson