New candidate JEP: 430: String Templates (Preview)

[Mark Reinhold]

https://openjdk.org/jeps/430

  Summary: Enhance the Java programming language with string
  templates, which are similar to string literals but contain embedded
  expressions. A string template is interpreted at run time by replacing
  each expression with the result of evaluating that expression, possibly
  after further validation and transformation. This is a preview language
  feature and API.

- Mark