remove extra space before code comment

Author: jmagaram

src/Core__Result.resi

@@ -215,7 +215,7 @@ let forEach: (t<'a, 'b>, 'a => unit) => unit
 the function `f` to the `Error` value.
 
 ## Examples
-  ```rescript
+```rescript
 
 let formatError = n => `Error code: ${n->Int.toString}`
 mapError(Error(14), formatError) // evaluates to Error("Error code: 14")