Support the "Info" category for flake8

Environment data

• VS Code version: 1.22.2
• Extension version: 2018.3.1
• OS and version: Ubuntu 17.10
• Python version: 3.6
• Type of virtual environment used: N/A
• Relevant/affected Python packages and their versions: flake8==3.5.0 flake8-import-order==0.17.1

Actual behavior

Flake8 plugin configuration settings don’t match the settings schema in vscode, even though the settings do work.

Expected behavior

Flake8 plugin settings are not marked as unknown in the vscode settings file.

Steps to reproduce:

1. Install flake8

2. Install flake8-import-order

3. Open a file with the following contents:

   from foo import bar
   
   import sys
   

4. Notice how this triggers an info level problem

5. Add this line to your vscode settings:

     "python.linting.flake8CategorySeverity.I": "Warning",
   

6. Notice this gives a warning in the settings file

7. Save or reopen the Python file

8. Notice that the severity level has changed from info to warning

Logs

N/A

[karthiknadig]

Please try the flake8 extension, currently in pre-release. We are looking for feedback on it, please create issues on github for the extension: https://marketplace.visualstudio.com/items?itemName=ms-python.flake8 . This will be the eventual successor for the flake8 linting support in the extension.

One of the things you can do there is customize the severity, by individual error codes or categories.

[MetRonnie]

This ought to work if the flake8 plugin uses more than 1 letter for the prefix, e.g. flake8-simplify uses SIM, but

"python.linting.flake8CategorySeverity.SIM": "Warning",

does not work (you have to use .S instead)