"Trigger Parameter Hints" shows argument defaults for Python but not for R

[juliasilge]

Discussed in https://github.com/posit-dev/positron-beta/discussions/118

^{Originally posted by JosiahParry April 15, 2024} Here i was using the hints to fill out required arguments. I found it odd that error_call and error_arg didnt have defaults. Turns out that wasn't the case.

[juliasilge]

If I do "Trigger Parameter Hints" from the command palette in Python, I see this:

From R, I see this:

[DavisVaughan]

QA notes:

The verification is something like this video. You accept a completion for a function name, and that automatically calls Trigger Parameter Hints (this is a command you can run manually). The parameter hints should now show the default values for arguments - like values = NULL and error_call = caller_env() here)

https://github.com/user-attachments/assets/bc220352-f6e3-436c-b467-3c86ee44c8ac

[testlabauto]

Verified Fixed

Positron Version(s) : 2024.08.0-88
OS Version          : OSX

Test scenario(s)

Tested according to video at end of issue.

Link(s) to TestRail test cases run or created: N/A