Adding single quote before foo@bar adds extra single quote

Environment data

• VS Code version: 1.27.2
• Extension version (available under the Extensions sidebar): 2018.8.0
• OS and version: Debian GNU/Linux (buster)
• Python version (& distribution if applicable, e.g. Anaconda): 2.7
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): N/A
• Relevant/affected Python packages and their versions:

Actual behavior

foo = [
    {
        'username': 'john',
        'blocked': True,
        'extra_emails': [
            foo@bar
        ]        
    }
]

When adding a single quote before foo@bar above, two single quote characters are inserted.

foo = [
    {
        'username': 'john',
        'blocked': True,
        'extra_emails': [
            ''foo@bar # <-- We got an extra single quote here
        ]        
    }
]

Interesting enough, if I change foo@bar to just foo and then press the quote character, the problem goes away - only a single quote gets inserted. So it seems to be specifically with email addresses/strings containing an @ character.

Expected behavior

A single quote character should be inserted.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Starting Jedi Python language engine.
##########Linting Output - pylint##########
************* Module foo
6,0,error,E0001:invalid syntax (<string>, line 6)

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

/usr/share/code/resources/app/out/vs/workbench/workbench.main.js:1411  INFO no standard startup: not just one window
/usr/share/code/resources/app/out/vs/workbench/workbench.main.js:3260 [PeterJausovec.vscode-docker]: Command `vscode-docker.delete-ACR-Image` appears multiple times in the `commands` section.
/usr/share/code/resources/app/out/vs/workbench/workbench.main.js:4236 Overwriting grammar scope name to file mapping for scope source.yaml.
Old grammar file: file:///usr/share/code/resources/app/extensions/yaml/syntaxes/yaml.tmLanguage.json.
New grammar file: file:///home/per/.vscode/extensions/redhat.vscode-yaml-0.0.16/syntaxes/yaml.tmLanguage.json
e.register @ /usr/share/code/resources/app/out/vs/workbench/workbench.main.js:4236
/usr/share/code/resources/app/out/vs/workbench/workbench.main.js:276 [Extension Host] vscode-icons is active!
/usr/share/code/resources/app/out/vs/workbench/workbench.main.js:276 [Extension Host] Git extension API method 'getGitPath' is deprecated.
t.log @ /usr/share/code/resources/app/out/vs/workbench/workbench.main.js:276

[brettcannon]

@perlun I would try the “Auto Closing Quotes” setting.

[perlun]

@DonJayamanne Good find - indeed, I am also. Please re-create this in the appropriate vscode repository and feel free to close the vscode-python issue (=this).