Fix highlighting offset (#1084)

* Fix highlighting offset

* Change test offsets

* Fix initial offset

* Change offsets

* Try again

Author: rjmholt

src/PowerShellEditorServices/Services/TextDocument/Handlers/DocumentHighlightHandler.cs

@@ -60,8 +60,8 @@ public Task<DocumentHighlightContainer> Handle(
 
             IReadOnlyList<SymbolReference> symbolOccurrences = _symbolsService.FindOccurrencesInFile(
                 scriptFile,
-                (int)request.Position.Line,
-                (int)request.Position.Character);
+                (int)request.Position.Line + 1,
+                (int)request.Position.Character + 1);
 
             if (symbolOccurrences == null)
             {

test/PowerShellEditorServices.Test.E2E/LanguageServerProtocolMessageTests.cs

@@ -444,7 +444,7 @@ await LanguageClient.SendRequest<DocumentHighlightContainer>(
                         },
                         Position = new Position
                         {
-                            Line = 4,
+                            Line = 3,
                             Character = 1
                         }
                     });