support new JDK version string scheme

…il-event-fix

Kullmann: Fix TracePoint nil event. Add test

…escapeHTML.

This was ported C code and it works in C because the string has a last \0 char.  Our array is not null byte terminated and we run off the end.  Adding a spec in a separate commit.

… Do not expand (nor crash)

Copy-editing: misspellings

finished AST will no longer have a ISourcePosition instance in it.  It will
be it.  The filename itself will also no longer be stored in every node but
the RootNode already has the name and the rest of the runtime already asks
the root for the filename.

This removes at least 1.5M from a single controller rails app (which is
an interesting stat in this is only AST nodes of methods which have never
been called).

Follow up commits will be to slowly remove the use of ISourcePosition
altogether (although it will be mostly Deprecations).

This experiment uses JVMCI to wrap Graal and customize its high
tier phases to include one that forces virtualization of all JRuby
objects.

See JVMCI.md.

This reverts commit 7a85122.