consider rename StringOps#lines. conflict jdk11 java.lang.String#lines

[xuwei-k]

• https://download.java.net/java/early_access/jdk11/docs/api/java.base/java/lang/String.html#lines()
• https://github.com/scala/scala/blob/v2.13.0-M5/src/library/scala/collection/StringOps.scala#L631

Welcome to Scala 2.13.0-M5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_181).
Type in expressions for evaluation. Or try :help.

scala> "a".lines
res0: Iterator[String] = <iterator>

Welcome to Scala 2.13.0-M5 (Java HotSpot(TM) 64-Bit Server VM, Java 11-ea).
Type in expressions for evaluation. Or try :help.

scala> "a".lines
res0: java.util.stream.Stream[String] = java.util.stream.ReferencePipeline$Head@4730e0f0

[NthPortal]

what should it be replaced with? linesIterator? getLines (not in favour of this one myself)? iterateLines?

[lyricallogical]

Even if we change lines' signature, the risk still exists that the same problem will happen.
For solving it, we should add a method like ops for converting explicitly to StringOps.

[dwijnand]

Everyone wants to define lines on String - we've been here before: #5994 😄

[retronym]

In scala/scala-dev#557, I suggested to restore linesIterator as an alias for lines. People using that can cross build between 2.12 and 2.13.

https://github.com/retronym/scala/tree/topic/linesIterator

WDYT?

[retronym]

Marking as a blocker as it can't be done in a minor release.

[xuwei-k]

https://github.com/scala/scala/pull/7218/files#diff-a7e7b847970727f538a3c4f0416d36b8