🎨 Put validate options into a variable

my_ocrd_workflow

@@ -22,7 +22,12 @@ remove_filegrp() {
 }
 
 do_validate() {
-  ocrd workspace validate --skip dimension --skip pixel_density --page-strictness lax --page-coordinate-consistency off mets.xml
+  validate_options="
+    --skip dimension
+    --skip pixel_density
+    --page-strictness lax
+    --page-coordinate-consistency off"
+  ocrd workspace validate $validate_options
   # XXX ocrd-tesserocr INCONSISTENCY in TextRegion → use "--page-strictness lax" for now
   # XXX INVALIDITY in Glyph ID etc. in GT → --page-coordinate-consistency off