I believe this code is currently incorrect, as it makes references to code outside the "if code" block, where it can not be ensured that code is a string. Moving the code processing into this block avoids this issue.
I experienced a stuck Addon Manager, which was caused by an exception
```
File "/usr/share/freecad/Mod/AddonManager/addonmanager_macro.py", line ..., in fill_details_from_wiki
FreeCAD.Console.PrintWarning(translate("AddonsInstaller", "Unable to clean macro code: ") + code + '\n')
TypeError: can only concatenate str (not "list") to str
```
which is fixed by these changes.
OS: Ubuntu 20.04.1 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4.
Build type: Release
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.3.0
Locale: English/United States (en_US)
Update formatting in compliance with pep8 with the following exceptions:
* truncate to 120 characters in line
* prefer double quotes `"` to single quotes `'` in strings
Correct crash when Macro description is not reachable
Python crashed when under proxy - Macro list is charged - Proxy is undone ( internet connection lost) - Try to load macro description (u=None)
Add Proxy setting in Addon Manager Option UI
Correction of SSL context
Replace ssl.Purpose.CLIENT_AUTH by ssl.Purpose.SERVER_AUTH as context for a client
Add configuration of proxy setting UI
Add proxy management by urllib
Read the metadata __Files__ for macros from git and install or remove
files listed there.
__Files__ must be a comma-separated list of files to be copied alongside
the macro. Their path must be relative to the macro (*.FCMacro file)
and not to othe root of the repository. Each file can be prefixed with a
subdirectory.
Separate the Macro class of the AddonManager into addonmanager_macro.py
to prepare for future support for dependent files for macros from the
git repository.
