RFR: JDK-8285932 Implementation of JEP 430 String Templates (Preview) [v70]

[Jim Laskey]

> 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](http://openjdk.java.net/jeps/12).

Jim Laskey has updated the pull request incrementally with one additional commit since the last revision:

  Update TestJavacTaskScanner.java

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10889/files
  - new: https://git.openjdk.org/jdk/pull/10889/files/f4f26611..6b09d2e4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10889&range=69
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10889&range=68-69

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10889.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/10889/head:pull/10889

PR: https://git.openjdk.org/jdk/pull/10889