fix: Make sure watch works for tocupdate target

Makefile

@@ -93,9 +93,9 @@ watch: ## run development server
 
 watch-tocupdate-internal:
 	while inotifywait -q -e move -e modify -e create -e attrib -e delete -e moved_to -r docs ; do \
-		sleep 0.2 ; \
+		sleep 2 ; \
 		$(MAKE) images ; \
-		pipenv run ./scripts/update-toc $(DOCS_DIR) ; \
+		$(MAKE) tocupdate ; \
 	done
 
 watch-docs-internal:

Procfile

@@ -1,3 +1,3 @@
 docs: make watch-docs-internal
 slides: make watch-slides-internal
-toc: make tocupdate
+toc: make watch-tocupdate-internal

scripts/update-toc

@@ -83,7 +83,7 @@ class TocBuilder:
             bname_split = os.path.splitext(bname)
             dname = os.path.dirname(f)
 
-            if lastdir != dname:
+            if lastdir != dname and dname != "":
                 lastdir = dname
                 title = self.__get_title(os.path.join(self.root_path, dname, 'index.md'))
                 if title is not None: