html_report "feed_publisher_name" not available

[r-leyshon]

Describe the bug

Running the tutorial at docs/tutorials/index.qmd, I started to include a demonstration of using multiGtfsInstance to produce a html report like so:

report_pth = feed.instances[0].gtfs_path.replace(".zip", "")
feed.instances[0].html_report(report_dir=report_pth)

This resulted in the 2 following warnings:

DataFrame.applymap has been deprecated. Use DataFrame.map instead.

KeyError. Feed was not cleaned.

and the following error:

TypeError                                 Traceback (most recent call last)
(https://file+.vscode-resource.vscode-cdn.net/Users/.../assess_gtfs/~/Documents/assess_gtfs/src/assess_gtfs/validation.py:1487)     "name_placeholder", self.feed.feed_info["feed_publisher_name"][0]

TypeError: 'NoneType' object is not subscriptable

Environment

• OS: macos
• Python version: 3.11.9
• Java version: openjdk 11.0.19 2023-04-18 LTS
• Python module versions (if different from requirements.txt): NA

Expected behavior

If feed_publisher_name is not available, populate with a placeholder, such as 'no publisher name was provided'.