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A Sad Commentary

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Contributed byA. P. Marki
SourceScala repository
First tested with Scala version2.12.9
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What is the result of executing the following code?

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+$ cat commentary.scala
+object Commentary extends App
+/* This is a long
+ * commentary.
+
+ */
+{
+  println("""This is a long
+commentary.
+
+""")
+}
+$ scalac commentary.scala
+$ scala commentary.scala
+$ cat commentary2.scala
+object Commentary extends App
+/* This is a long \u000acommentary.\u000a\u000a */
+{
+  println("This is a long \u000acommentary.\u000a\u000a")
+}
+$ scalac commentary2.scala
+$ scala commentary2.scala
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+
    +
  1. Both compile and run, printing "This is a long commentary." with extra blank lines.
    2. +
  2. Both compile and run, but the second prints "This is a long acommentary."
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  3. The second compiles and runs, but the first does not compile.
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  4. The first compiles and runs, but the second does not compile.
    5. +
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