[nostalgia/developer-handbook] Update error handling section

developer-handbook.md

@@ -163,10 +163,11 @@ The Ox way of doing things is the Olympic way of doing things.
 ### Error Handling
 
 Instead of throwing exceptions, generally try to use
-[ox::Errors](deps/ox/ox-docs.md#error-handling) for error reporting,
-but exceptions may be used where they make sense.
+[ox::Error](deps/ox/ox-docs.md#error-handling) for error reporting.
+Exceptions may be used where errors-as-values will not work, but catch them and
+convert them to ```ox::Error``` as soon as possible.
 
-Exceptions should generally just use ```OxException```, which is bascially an
+Exceptions should generally just use ```ox::Exception```, which is basically an
 exception form of ```ox::Error```.
 
 ### File I/O