message: Fix a small error in one of the syntax preview files.
diff: @@ -243,7 +243,7 @@ Write-Host Hello -name "World"
  $an_array = @(1, 2, 3)
  $a_hash = @{"something" = "something else"}
  -& notepad .\readme.md
  +& notepad .\\readme.md
  `},
  