Correct the doctest runner.

Author: robrix

semantic-core/test/Doctest.hs

@@ -9,4 +9,4 @@ main :: IO ()
 main = do
   args <- getArgs
   autogen <- fmap (<> "/build/doctest/autogen") <$> lookupEnv "HASKELL_DIST_DIR"
-  doctest (maybe id ((:) . ("-i" <>)) autogen ("-isrc" : "--fast" : if null args then ["src"] else args))
+  doctest (maybe id ((:) . ("-i" <>)) autogen ("-isemantic-code/src" : "--fast" : if null args then ["semantic-core/src"] else args))