Clarify how to use the PowerShell completions #695
Description
Describe the feature or problem you’d like to solve
The page https://cli.github.com/manual/gh_completion explains to use the completions by adding eval "$(gh completion)" to a profile file.
For PowerShell, the equivalent command is gh completion -s powershell | iex, which produces the following error:
> gh completion -s powershell | iex
iex : At line:1 char:67
+ Register-ArgumentCompleter -Native -CommandName 'gh' -ScriptBlock {
+ ~
Missing closing '}' in statement block or type definition.
At line:1 char:31
+ gh completion -s powershell | iex
+ ~~~
+ CategoryInfo : ParserError: (:) [Invoke-Expression], ParseException
+ FullyQualifiedErrorId : MissingEndCurlyBrace,Microsoft.PowerShell.Commands.InvokeExpressionCommandProposed solution
Explain how to use the PowerShell completions