Linting for when a backtick is followed only by white space

[AndrewGaspar]

Moved from PowerShell/vscode-powershell#69

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I've been bitten by this bug a few times:

$oven = Toast-Bread ` 
    -Bread Wheat

You probably can't see the problem - there's a space after the backtick, which causes the parser not to take the next line as part of the command, causing the command to be issued without the Bread parameter. It would be great if vscode-powershell highlighted this issue because I'm sure it's almost never done intentionally.

This seems to be a PowerShell problem generally - why isn't a backtick followed only by white space and a newline handled the same as a backtick immediately followed by a newline?

[daviwil]

Related conversation: #218

[joeyaiello]

Yeah, this makes a lot of sense to me as a warning.

Is everyone onboard with warning as the severity level? If you really intend to escape a space, add a SuppressMessage attribute.

[daviwil]

Or maybe make the rule scoped to backticks followed by arbitrary whitespace and a newline

[joeyaiello]

Good point.

[raghushantha]

Andrew added the new rule!
#425