8154997: Add examples for jigsaw diagnostics Reviewed-by: jjg, jlahoda

Merge

8149599: Update Minefield test Reviewed-by: martin

8156954: javac incorrectly complains of incompatible types Summary: Add heuristics to pick best stuck constraint as per JLS 18.5.2 Reviewed-by: vromero

8157102: Avoid exceptional control flow in Configuration.getText Reviewed-by: jjg

8153920: jshell tool: allow a parameter on the /vars /methods /classes commands Reviewed-by: vromero

8154812: jshell tool: value printing truncation Reviewed-by: vromero

8154180: Regression: stuck expressions do not behave correctly Summary: ArgumentAttr should not cache stuck trees Reviewed-by: vromero

8078559: Update error message to indicate illegal character when encoding set to ascii Summary: When an input character cannot be decoded, include it in the produced error Reviewed-by: jjg

8054562: document skip results in RunCodingRules.java Summary: Documenting when RunCodingRules gets skipped; adding a short description of AssertCheckAnalyzer and MutableFieldsAnalyzer Reviewed-by: jjg

8156180: javac accepts code that violates JLS chapter 16 Summary: DA/DU analysis should skip parenthesis around variable references Reviewed-by: vromero

8153884: Expression lambda erroneously compatible with void-returning descriptor Summary: Fix lambda compatibility check for void returning expressions Reviewed-by: vromero

8157030: langtools dev build broken after classfile version bump Summary: fix build to use different source/target version when compiling build tools Reviewed-by: jlahoda

Added tag jdk-9+119 for changeset e420b9f05aaf