Prompt with @input behaves differently when @input has no spaces in the string

[marckruzik]

Describe the bug

This example from the doc is working:

#!set --name url --value @input:"Please enter a URL"

Which gives a prompt Please enter a URL.

But if there is no space in the input, the prompt changes.

#!set --name url --value @input:"Please-enter-a-URL"

Which gives a prompt Please enter a value for field "Please-enter-a-URL"..
But it should give the prompt Please-enter-a-URL.

Same goes with a one word input such as "Age".

#!set --name url --value @input:"Age"

I think the intended behavior of @input is to specify the prompt, rather than having a wording about a field.
So in all cases, the prompt should be the content specified in @input.

Notes

Maybe there is a confusion with @input:input-please (notice the absence of double quotes), as seen in VariableSharingTests.SetMagicCommand.cs:

#!set --name newVar3 --value @input:input-please

This is an undocumented use of @input.
The behavior seems to be the same with @input:input-please (without double quotes) and @input:"input-please" (with double quotes): it asks for a field instead of using the text in place of the prompt.

Please complete the following:

Which version of .NET Interactive are you using? (In a notebook, run the #!about magic command. ):

Version: 1.0.456201+e5dc02dbdc933d895d722e69bfa98d580dcda8d9

• OS
  • Windows 11
  • Windows 10
  • macOS
  • Linux (Please specify distro)
  • iOS
  • Android
• Browser
  • Chrome
  • Edge
  • Firefox
  • Safari
• Frontend
  • Jupyter Notebook
  • Jupyter Lab
  • nteract
  • Visual Studio Code
  • Visual Studio Code Insiders
  • Visual Studio
  • Other (please specify)

[jonsequitur]

The current logic is that if there's no other option in the magic command to indicate a field name (e.g. the --name option for the #!set command), and the prompt is usable as a field name (e.g. has no spaces), then the field name is inferred from the prompt.

I'm fixing some of the quote behavior inconsistencies as part of the PR for #3323.

[jonsequitur]

Under the new magic command parser, this syntax will always be treated as the input prompt. The concept of an input name is no longer present, as it's now always inferred from the associated parameter.