fix: Make showarg a public function

kunzaatko · kunzaatko · commit 725b432ff808 · 2025-05-22T12:25:25.000+02:00
`showarg` is meant to be public and it is directly specified in the
documentation that it is meant for overriding.
diff --git a/base/public.jl b/base/public.jl
@@ -111,6 +111,7 @@ public
     reseteof,
     link_pipe!,
     dup,
+    showarg,
 
 # filesystem operations
     rename,
