KT-6330 When completion for boolean method/property is finished by typing '!' symbol it should insert selected item with negation

#KT-6330 Fixed

idea/idea-completion/testData/handlers/basic/ExclChar1.kt

@@ -0,0 +1,6 @@
+fun foo(flag: Boolean) {
+    if (<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar1.kt.after

@@ -0,0 +1,6 @@
+fun foo(flag: Boolean) {
+    if (!flag<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar2.kt

@@ -0,0 +1,8 @@
+fun String.checkIt(s: String): Boolean = true
+
+fun foo(s: String) {
+    if (s.<caret>)
+}
+
+// ELEMENT: checkIt
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar2.kt.after

@@ -0,0 +1,8 @@
+fun String.checkIt(s: String): Boolean = true
+
+fun foo(s: String) {
+    if (!s.checkIt(<caret>))
+}
+
+// ELEMENT: checkIt
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar3.kt

@@ -0,0 +1,8 @@
+class C(val flag: Boolean)
+
+fun foo(c: C) {
+    if (c.<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar3.kt.after

@@ -0,0 +1,8 @@
+class C(val flag: Boolean)
+
+fun foo(c: C) {
+    if (!c.flag<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar4.kt

@@ -0,0 +1,8 @@
+fun flag(): Boolean{}
+
+fun foo() {
+    if (<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar4.kt.after

@@ -0,0 +1,8 @@
+fun flag(): Boolean{}
+
+fun foo() {
+    if (!flag()<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar5.kt

@@ -0,0 +1,6 @@
+fun foo() {
+    if (<caret>)
+}
+
+// ELEMENT: true
+// CHAR: '!'

idea/idea-completion/testData/handlers/basic/ExclChar5.kt.after

@@ -0,0 +1,6 @@
+fun foo() {
+    if (!true<caret>)
+}
+
+// ELEMENT: true
+// CHAR: '!'

idea/idea-completion/testData/handlers/smart/ExclChar.kt

@@ -0,0 +1,6 @@
+fun foo(flag: Boolean) {
+    if (<caret>)
+}
+
+// ELEMENT: flag
+// CHAR: '!'

idea/idea-completion/testData/handlers/smart/ExclChar.kt.after

@@ -0,0 +1,6 @@
+fun foo(flag: Boolean) {
+    if (!flag)<caret>
+}
+
+// ELEMENT: flag
+// CHAR: '!'