Typo

Author: cgeorgii

docs/contributing/plugin-tutorial.md

@@ -195,7 +195,7 @@ runImportCommand _ (ImportCommandParams edit) = do
   return (Right Null)
 ```
 
-It [sends a request](https://hackage.haskell.org/package/lsp-1.6.0.0/docs/Language-LSP-Server.html#v:sendRequest) with the method `SWorkspaceApplyEdit` to the server with the `ApplyWorkspaceEditParams Nothing edit` parameters and an a response handler (that does nothing). It then returns `Right Null`, an empty `Aeson.Value` wrapped in `Right`.
+It [sends a request](https://hackage.haskell.org/package/lsp-1.6.0.0/docs/Language-LSP-Server.html#v:sendRequest) with the method `SWorkspaceApplyEdit` to the server with the `ApplyWorkspaceEditParams Nothing edit` parameters and a response handler (that does nothing). It then returns `Right Null`, an empty `Aeson.Value` wrapped in `Right`.
 
 ### The code lens provider