KT-10655 No "in" in code completion popup after "!"

#KT-10655 Fixed

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/KeywordCompletion.kt

@@ -40,6 +40,7 @@ import org.jetbrains.kotlin.lexer.KtTokens.*
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.*
 import org.jetbrains.kotlin.resolve.ModifierCheckerCore
+import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstanceOrNull
 
 open class KeywordLookupObject
 
@@ -139,7 +140,22 @@ object KeywordCompletion {
         while (parent != null) {
             when (parent) {
                 is KtBlockExpression -> {
-                    return buildFilterWithContext("fun foo() { ", prevParent, position)
+                    val prefixText = "fun foo() { "
+                    if (prevParent is KtExpression) {
+                        return buildFilterWithContext(prefixText, prevParent, position)
+                    }
+                    else {
+                        val lastExpression = prevParent
+                                .siblings(forward = false, withItself = false)
+                                .firstIsInstanceOrNull<KtExpression>()
+                        if (lastExpression != null) {
+                            val contextAfterExpression = lastExpression
+                                    .siblings(forward = true, withItself = false)
+                                    .takeWhile { it != prevParent }
+                                    .joinToString { it.text }
+                            return buildFilterWithContext(prefixText + "x" + contextAfterExpression, prevParent, position)
+                        }
+                    }
                 }
 
                 is KtWithExpressionInitializer -> {

idea/idea-completion/testData/keywords/NotInNotIs2.kt

@@ -0,0 +1,7 @@
+fun foo() {
+    list.filter { it !i<caret> }
+}
+
+// EXIST: in
+// EXIST: is
+// NOTHING_ELSE

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/KeywordCompletionTestGenerated.java

@@ -353,6 +353,12 @@ public class KeywordCompletionTestGenerated extends AbstractKeywordCompletionTes
         doTest(fileName);
     }
 
+    @TestMetadata("NotInNotIs2.kt")
+    public void testNotInNotIs2() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/keywords/NotInNotIs2.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("PrefixMatcher.kt")
     public void testPrefixMatcher() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/keywords/PrefixMatcher.kt");