Expand a few aliases

plot.ps1

@@ -155,7 +155,7 @@ class PSPlot {
         $sum=0
         
         $columnName.ToCharArray() |
-            ForEach {
+            ForEach-Object {
                 $sum*=26
                 $sum+=[char]$_.tostring().toupper()-[char]'A'+1
             }