Fixed KT-6429 Wrong replacement range in smart completion in some particular case

#KT-6429 Fixed

idea/src/org/jetbrains/jet/plugin/completion/KotlinCompletionContributor.kt

@@ -272,7 +272,7 @@ public class KotlinCompletionContributor : CompletionContributor() {
         val chars = document.getCharsSequence()
         while (i < chars.length()) {
             val c = chars.charAt(i)
-            if (c == '\n' || c == 'r') return true
+            if (c == '\n') return true
             if (!Character.isWhitespace(c)) return false
             i++
         }

idea/testData/completion/handlers/smart/ReplaceArgument.kt

@@ -0,0 +1,11 @@
+import java.util.ArrayList
+
+class C(p: Int, p2: Int)
+
+fun foo(p: Int){
+    val result = ArrayList<String>()
+    C(1, <caret>result.size())
+}
+
+// CHAR: '\t'
+// ELEMENT: p

idea/testData/completion/handlers/smart/ReplaceArgument.kt.after

@@ -0,0 +1,11 @@
+import java.util.ArrayList
+
+class C(p: Int, p2: Int)
+
+fun foo(p: Int){
+    val result = ArrayList<String>()
+    C(1, p)<caret>
+}
+
+// CHAR: '\t'
+// ELEMENT: p

idea/tests/org/jetbrains/jet/completion/handlers/SmartCompletionHandlerTestGenerated.java

@@ -19,7 +19,6 @@ package org.jetbrains.jet.completion.handlers;
 import com.intellij.testFramework.TestDataPath;
 import org.jetbrains.jet.JUnit3RunnerWithInners;
 import org.jetbrains.jet.JetTestUtils;
-import org.jetbrains.jet.test.InnerTestClasses;
 import org.jetbrains.jet.test.TestMetadata;
 import org.junit.runner.RunWith;
 
@@ -534,6 +533,12 @@ public class SmartCompletionHandlerTestGenerated extends AbstractSmartCompletion
         doTest(fileName);
     }
 
+    @TestMetadata("ReplaceArgument.kt")
+    public void testReplaceArgument() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/handlers/smart/ReplaceArgument.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("SAMExpected1.kt")
     public void testSAMExpected1() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/handlers/smart/SAMExpected1.kt");