This blog provides a PowerShell script to fix PSScriptAnalyzer line has trailing whitespace warnings.
Given the path to a PowerShell module it will iterate through any psd1 and psm1 files and remove any trailing white space:
$pathToModule = "C:Program Files\WindowsPowerShell\Modules\Alkane1.0.0"
$fileExtensions = @(".psd1",".psm1")
get-childitem -Path $pathToModule | where {$_.extension -in $fileExtensions} | foreach { $filePath = $_.FullName
#read all lines from the file
$fileContent = Get-Content -Path $filePath
#remove trailing spaces from each line
$updatedContent = $fileContent | ForEach-Object { $_.TrimEnd() }
#save the updated content back to the file
Set-Content -Path $filePath -Value $updatedContent
write-host "Trailing spaces removed from file: $filePath" }
