Behavior on typing chars with code completion lookup is completely defined by our own handler + added tests for this handler + fixed a few bugs related to this behavior

generators/src/org/jetbrains/jet/generators/tests/GenerateTests.kt

@@ -130,6 +130,7 @@ import org.jetbrains.jet.j2k.test.AbstractJavaToKotlinConverterMultiFileTest
 import org.jetbrains.jet.j2k.test.AbstractJavaToKotlinConverterForWebDemoTest
 import org.jetbrains.jet.plugin.decompiler.textBuilder.AbstractDecompiledTextTest
 import org.jetbrains.jet.completion.AbstractMultiFileSmartCompletionTest
+import org.jetbrains.jet.completion.handlers.AbstractCompletionCharFilterTest
 
 fun main(args: Array<String>) {
     System.setProperty("java.awt.headless", "true")
@@ -358,6 +359,10 @@ fun main(args: Array<String>) {
             model("completion/handlers/smart")
         }
 
+        testClass(javaClass<AbstractCompletionCharFilterTest>()) {
+            model("completion/handlers/charFilter")
+        }
+
         testClass(javaClass<AbstractCodeFragmentCompletionTest>()) {
             model("completion/basic/codeFragments", extension = "kt")
         }