fixed PY-6884 Paste changes code logic in case empty line inside indented block

python/src/com/jetbrains/python/editor/PythonCopyPasteProcessor.java

@@ -42,23 +42,6 @@ public class PythonCopyPasteProcessor implements CopyPastePreProcessor {
     final Document document = editor.getDocument();
     String newText = text;
 
-    //a lot of different indents inside selected
-    final String[] split = StringUtil.trimTrailing(text).split("\n");
-    int firstIndent = 0;
-    int currentIndent;
-    for (String s : split) {
-      currentIndent = s.length() - s.trim().length();
-      if (split[0].equals(s) ) {
-        firstIndent = currentIndent;
-      }
-      if (!StringUtil.isEmptyOrSpaces(s) && firstIndent > currentIndent) {
-        if (caretModel.getLogicalPosition().column > 0)
-          return StringUtil.trimLeading(text);
-        else
-          return text;
-      }
-    }
-
     if (file instanceof PyFile && (StringUtil.startsWithWhitespace(text) || StringUtil.endsWithLineBreak(text) ||
                                    StringUtil.splitByLines(text).length > 1)) {
       if (text.endsWith("\n")) text = text.substring(0, text.length() - 1);

python/testData/copyPaste/multiLine/IndentIfElse.after.py

@@ -4,3 +4,4 @@ def f():
         print(0.1)
     else:
         print(0.1)
+        <caret>

python/testData/copyPaste/multiLine/IndentWithEmptyLine.after.py

@@ -0,0 +1,9 @@
+def foo():
+    if True:
+        a = 1
+        for (u, v) in range(1):
+            if True:
+                b = 1
+
+            graph.clear = 0.1
+        <caret>

python/testData/copyPaste/multiLine/IndentWithEmptyLine.dst.py

@@ -0,0 +1,4 @@
+def foo():
+    if True:
+        a = 1
+        <caret>

python/testData/copyPaste/multiLine/IndentWithEmptyLine.src.py

@@ -0,0 +1,6 @@
+<selection>for (u, v) in range(1):
+    if True:
+        b = 1
+
+    graph.clear = 0.1
+</selection>

python/testSrc/com/jetbrains/python/PyCopyPasteTest.java

@@ -171,6 +171,10 @@ public class PyCopyPasteTest extends PyTestCase {
     doTestMultiLine();
   }
 
+  public void testIndentWithEmptyLine() {    //PY-6884
+    doTestMultiLine();
+  }
+
   public void testIndentOnTopLevel() {    //PY-6928
     doTestSingleLine();
   }