Draft JLS spec for JEP 305: Pattern matching for instanceof

[Chris Hegarty]

> On 21 Oct 2019, at 10:50, Gavin Bierman <gavin.bierman at oracle.com> wrote:
> 
> A second, and hopefully final, draft language spec for JEP 305 (Pattern matching for instanceof) is available at:
> 
> http://cr.openjdk.java.net/~gbierman/jep305/jep305-20191021/specs/patterns-instanceof-jls.html

While proofreading, I came across a minor issue in 15.20.2:

	"• The expression RelationalExpression is compatible with the type ReferenceType if (i) RelationalExpression can be converted to type ReferenceType by casting conversion (5.5), and (ii) the casting conversion does not make use of a narrowing reference conversion which is unchecked (5.1.6.2). If ReferenceType is not compatible with ReferenceType then a compile-time error occurs."

Should be:
    If *RelationalExpression* is not compatible with ReferenceType then a compile-time error occurs.

-Chris.