fixed PY-6928 Paste inserts code one line after caret and messes up code in case for as the last compound statement in function

PY-6907 Paste leads to syntactically incorrect code in case of dedent in copied text

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

@@ -0,0 +1,6 @@
+try:
+    return dct[key]
+except KeyError:
+    pass
+
+a = 1

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

@@ -0,0 +1,3 @@
+try:
+    <caret>
+a = 1

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

@@ -0,0 +1,7 @@
+class A:
+    def foo(self, dct, key):
+        try:
+<selection>            return dct[key]
+        except KeyError:
+            pass
+</selection>

python/testData/copyPaste/singleLine/IndentOnTopLevel.after.py

@@ -0,0 +1,8 @@
+class C:
+    def foo(self):
+        x = 1
+        y = 2
+
+x = 1
+def foo():
+    pass

python/testData/copyPaste/singleLine/IndentOnTopLevel.dst.py

@@ -0,0 +1,8 @@
+class C:
+    def foo(self):
+        x = 1
+        y = 2
+
+<caret>
+def foo():
+    pass

python/testData/copyPaste/singleLine/IndentOnTopLevel.src.py

@@ -0,0 +1,4 @@
+class C:
+    def foo(self):
+<selection>        x = 1</selection>
+        y = 2