Fix #682 - [system.manage<Tab>] doesn't work

test/powershell/Host/TabCompletion/BugFix.Tests.ps1

@@ -0,0 +1,9 @@
+Describe "Issue#682 - [system.manage<tab>] should work" {
+    
+    It "[system.manage<tab>" {
+        $result = TabExpansion2 -inputScript "[system.manage" -cursorColumn "[system.manage".Length
+        $result | Should Not BeNullOrEmpty
+        $result.CompletionMatches.Count | Should Be 1
+        $result.CompletionMatches[0].CompletionText | Should Be "System.Management"
+    }
+}