Fix file watcher regression (#28)

`supported-file?` is given a path argument that cannot be coerced into a `java.io.File` unless a coercion is present on the classpath clojure-emacs/refactor-nrepl/issues/355.

Co-authored-by: ikappaki <ikappaki@users.noreply.github.com>
Co-authored-by: Martin Kavalar <mk@katercalling.com>

src/nextjournal/clerk.clj

@@ -175,16 +175,14 @@
   "Returns whether `path` points to a file that should be shown."
   [path]
   ;; file names starting with .# are most likely Emacs lock files and should be ignored.
-  (->> path io/file .getName
-       (re-matches #"(?!^\.#).+\.(md|clj|cljc)$")
-       some?))
-
-#_(supported-file? "foo_bar.clj")
-#_(supported-file? "xyz/foo.md")
-#_(supported-file? "xyz/foo.clj")
-#_(supported-file? "xyz/abc.#name.cljc")
-#_(supported-file? ".#name.clj")
-#_(supported-file? "xyz/.#name.cljc")
+  (some? (re-matches #"(?!^\.#).+\.(md|clj|cljc)$" (.. path getFileName toString))))
+
+#_(supported-file? (fs/path "foo_bar.clj"))
+#_(supported-file? (fs/path "xyz/foo.md"))
+#_(supported-file? (fs/path "xyz/foo.clj"))
+#_(supported-file? (fs/path "xyz/a.#name.cljc"))
+#_(supported-file? (fs/path ".#name.clj"))
+#_(supported-file? (fs/path "xyz/.#name.cljc"))
 
 
 (defn file-event [{:keys [type path]}]