delete generated HTML file before generating new one, not at the bottom

Bug was that when confirming "[E]dit again" by providing an empty string,
the file wasn't deleted

we could as well do
if [ "$post_status" != "p" ] && [ "$post_status" != "P" ]
but this way is IMO cleaner

bb.sh

@@ -584,7 +584,9 @@ EOF
     chmod 600 "$TMPFILE"
 
     post_status="E"
+    filename=""
     while [ "$post_status" != "p" ] && [ "$post_status" != "P" ]; do
+        [ "$filename" ] && rm "$filename" # Delete the generated html file, if any
         $EDITOR "$TMPFILE"
         if [[ "$fmt" == "md" ]]; then
             html_from_md="$(markdown "$TMPFILE")"
@@ -622,9 +624,6 @@ EOF
             echo "Saved your draft as '$draft'"
             exit
         fi
-        if [[ "$post_status" == "e" ]] || [[ "$post_status" == "E" ]]; then
-            rm "$filename" # Delete the html file as it will be generated again
-        fi
     done
 
     rm "$TMPFILE"