KT-21811 Convert string concatenation into multiline string (#2772)

New J2K: Convert string concatenation into multiline string

#KT-21811 Fixed

nj2k/testData/newJ2k/docComments/deprecatedDocTagWithMultiLineMessage.kt

@@ -1,2 +1,7 @@
-@Deprecated("Ph'nglui mglw'nafh\n" + "  Cthulhu R'lyeh wgah'nagl fhtagn.\n" + "  'In His House at R'lyeh\n" + "  Dead Cthulhu waits dreaming,\n" + "  yet He shall rise and His kingdom\n" + "  shall cover the Earth.'")
+@Deprecated("""Ph'nglui mglw'nafh
+  Cthulhu R'lyeh wgah'nagl fhtagn.
+  'In His House at R'lyeh
+  Dead Cthulhu waits dreaming,
+  yet He shall rise and His kingdom
+  shall cover the Earth.'""")
 class TestDeprecatedInJavadocWithMultilineMessage 

nj2k/testData/newJ2k/postProcessing/ConvertConcatenationToRawString.java

@@ -0,0 +1,5 @@
+public class Test {
+    String s = "asdf\n" +
+               "nadfadsf\n" +
+               "asdfasdf";
+}

nj2k/testData/newJ2k/postProcessing/ConvertConcatenationToRawString.kt

@@ -0,0 +1,7 @@
+class Test {
+    var s = """
+        asdf
+        nadfadsf
+        asdfasdf
+        """.trimIndent()
+}