Lab and Downward Lab 8.1

[Jendrik Seipp]

Hi everyone,

I'm happy to announce a new version of Lab and Downward Lab (https://lab.readthedocs.io). Here are the most important changes:

• Allow passing properties files to fetchers directly (Jendrik Seipp).
• Let fetch and report steps log only the total number of unexplained errors instead of printing all of them to stderr (Jendrik Seipp).
• Let parsers print an error if the file for a required pattern is missing. Call parser functions with empty string for missing files (Silvan Sievers).
• Raise an error if a run command calls a Python script directly, because this would bypass the virtual environment (Jendrik Seipp).
• Make HTML table headers sticky (Jendrik Seipp).

To upgrade to the latest version, use "pip install --upgrade lab" (preferably in a virtual environment).

Cheers,
Jendrik