Code tooltip has no syntax highlighting

[OutOfFocus4]

Environment data

• VS Code version: 1.55.2
• Extension version (available under the Extensions sidebar): 2021.4.765268190
• OS and version: Darwin x64 20.3.0
• Python version (& distribution if applicable, e.g. Anaconda): CPython 3.9.4, 3.7.9
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
• Relevant/affected Python packages and their versions: None
• Relevant/affected Python-related VS Code extensions and their versions: Python
• Value of the python.languageServer setting: "Jedi"

Expected behaviour

When hovering over code and a tooltip appears, the code in that tooltip will have syntax highlighting.

Example on Windows:

Actual behaviour

Tooltip has no syntax coloring.

Steps to reproduce:

1. On a Mac, create a file called temp.py with the following content:

print(isinstance)

2. Hover over isinstance
3. The tooltip will only use monochromatic text.

[karthiknadig]

@OutOfFocus4 This is likely because of language server used in each of these scenarios. Try JediLSP or Pylance as the language server options and see if they help with this.

[OutOfFocus4]

@karthiknadig Both are using the default language server (Jedi), but only one of them uses syntax highlighting in the tooltips. I fail to see how using a different language server fixes the issue of this language server giving different results depending on the platform.

Off-topic, but if I switch to JediLSP, the text isn't formatted correctly, which is why I prefer Jedi:

[karthiknadig]

@OutOfFocus4 Jedi setting we have is outdated (i.e, it uses a old version of jedi to support 2.7). Any fix for that should come from jedi itself (https://github.com/davidhalter/jedi). Given we use an old version, it will likely not be addressed there. The jedilsp setting uses the latest jedi, I have already filed this bug on them pappasam/jedi-language-server#98

I recommend trying pylance, to see if that behaves better. If you run into issues with pylance please file a bug on https://github.com/microsoft/pylance-release

[kimadeline]

Doesn't happen with Jedi behind LSP (introduced in #11995) in 2021.10.1255420962-dev, will be out in 2021.10 stable: