make header format yaml

vision/lowdown.md

@@ -1,6 +1,9 @@
 ---
-title: "Markdown to PDF"
-tags: [ "markdown", ".pdf", "vision" ]
+title: Markdown to PDF
+tags: 
+- markdown
+- .pdf
+- vision
 ---
 
 Turn a markdown file into a pdf:
@@ -21,7 +24,7 @@ To give the document a title, put that title in the metadata:
 
 ```sh
 sed -i "1 i---" "$FILE".md
-sed -i "1 ititle: $TITLE" "$FILE".md
+sed -i 1 ititle: $TITLE $FILE.md
 sed -i "1 i---" "$FILE".md
 lowdown -L "$FILE".md
 lowdown -X title "$FILE".md