Fixes formatting issue

src/vs/vscode.d.ts

@@ -705,7 +705,7 @@ declare module 'vscode' {
 		/**
 		 * An optional view column in which the [editor](#TextEditor) should be shown. The default is the [one](#ViewColumn.One), other values are adjusted to be __Min(column, columnCount + 1)__.
 		 */
-		column ?: ViewColumn,
+		column?: ViewColumn,
 
 		/**
 		 * An optional flag that when `true` will stop the [editor](#TextEditor) from taking focus.