Update expected test output to Cmdliner 1.1.0 way of printing

Leonidas-from-XIV · Leonidas-from-XIV · commit 85654df98e3a · 2022-02-28T11:33:28.000+01:00
diff --git a/test/bin/mdx-test/misc/no-such-file/test.expected b/test/bin/mdx-test/misc/no-such-file/test.expected
@@ -1,3 +1,3 @@
-ocaml-mdx: FILE argument: no `foo' file
-Usage: ocaml-mdx test [OPTION]... FILE
-Try `ocaml-mdx test --help' or `ocaml-mdx --help' for more information.
+ocaml-mdx: FILE argument: no 'foo' file
+Usage: ocaml-mdx test [OPTION]… FILE
+Try 'ocaml-mdx test --help' or 'ocaml-mdx --help' for more information.
diff --git a/test/bin/mdx-test/misc/no-such-prelude/test.expected b/test/bin/mdx-test/misc/no-such-prelude/test.expected
@@ -1,3 +1,3 @@
-ocaml-mdx: option `--prelude': no `foo' file
-Usage: ocaml-mdx test [OPTION]... FILE
-Try `ocaml-mdx test --help' or `ocaml-mdx --help' for more information.
+ocaml-mdx: option '--prelude': no 'foo' file
+Usage: ocaml-mdx test [OPTION]… FILE
+Try 'ocaml-mdx test --help' or 'ocaml-mdx --help' for more information.
