.Split() Method behaving differently in PowerShell v5 and v7 - causing issue with Docker install.ps1

SplitMethodPowerShellVer5VsVer7.ps1

# Try running this in PowerShell 5 and then in PowerShell 7 - you'll see different behavior
# with the .Split() method

$PSVersionTable.PSVersion
$tab = [char]9
$hasTab = "[$tab]"
$hasTabAndSpace = "[$tab ]"
$hasTab
$hasTabAndSpace
$hasTab.Split(' ')
$hasTab.Split($tab)
$hasTab.Split("$tab ") # 5 splits here, 7 doesn't
$hasTabAndSpace.Split("$tab ") # 5 vs 7 different
$hasTabAndSpace.Split("$tab ").count

# Simple way to show difference
'[ ]'.Split(' ') # Split on single space
'[ ]'.Split('  ') # Split on two spaces

# Demo the PS 5 vs 7 difference with the docker version string output
$tab = [char]9
"This is a tab: [$tab] Okay?"
$tmp = docker -v|Out-String
$tmp
$tmp = $tmp.Trim().Split("$tab ",3)
$tmp[2]