paste the last \n into gstring

java/java-impl/src/com/intellij/codeInsight/editorActions/StringLiteralCopyPasteProcessor.java

@@ -144,9 +144,10 @@ public class StringLiteralCopyPasteProcessor implements CopyPastePreProcessor {
       @NonNls String breaker = getLineBreaker(token);
       final String[] lines = LineTokenizer.tokenize(text.toCharArray(), false, true);
       for (int i = 0; i < lines.length; i++) {
-        String line = lines[i];
-        buffer.append(escapeCharCharacters(line, token, escapeSlashes));
-        if (i != lines.length - 1) buffer.append(breaker);
+        buffer.append(escapeCharCharacters(lines[i], token, escapeSlashes));
+        if (i != lines.length - 1 || "\n".equals(breaker) && text.endsWith("\n")) {
+          buffer.append(breaker);
+        }
       }
       text = buffer.toString();
     }

plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyCopyPasteTest.groovy

@@ -86,4 +86,18 @@ Foo f'''
     doTest  'a.txt', '<selection>a\nd</selection>', 'def x = "smth<caret>"', 'def x = "smtha\\n" +\n        "d<caret>"'
   }
 
+  public void testGStringEolReplace() throws Exception {
+    doTest  'a.txt',
+            '''<selection>first
+second
+</selection>''',
+            '''def x = """
+<selection>foo
+</selection>"""''',
+            '''def x = """
+first
+second
+<caret>"""'''
+  }
+
 }