Fix inserting variable name suggestion on non-enter char typing

#KT-21933 fixed

idea/idea-completion/testData/handlers/charFilter/VariableName.kt

@@ -0,0 +1,10 @@
+class Clz
+
+
+fun foo() {
+    val cl<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT_TEXT: clz
+// CHAR: ' '

idea/idea-completion/testData/handlers/charFilter/VariableName.kt.after

@@ -0,0 +1,10 @@
+class Clz
+
+
+fun foo() {
+    val cl <caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT_TEXT: clz
+// CHAR: ' '

idea/idea-completion/testData/handlers/charFilter/VariableName2.kt

@@ -0,0 +1,10 @@
+class Clz
+
+
+fun foo() {
+    val cl<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT_TEXT: clz
+// CHAR: ':'

idea/idea-completion/testData/handlers/charFilter/VariableName2.kt.after

@@ -0,0 +1,10 @@
+class Clz
+
+
+fun foo() {
+    val cl:<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT_TEXT: clz
+// CHAR: ':'

idea/idea-completion/testData/handlers/charFilter/VariableName3.kt

@@ -0,0 +1,10 @@
+class Clz
+
+
+fun foo() {
+    val cl<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT_TEXT: clz
+// CHAR: '='

idea/idea-completion/testData/handlers/charFilter/VariableName3.kt.after

@@ -0,0 +1,10 @@
+class Clz
+
+
+fun foo() {
+    val cl=<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT_TEXT: clz
+// CHAR: '='