ssa: Split a line (no behaviour change)

Author: asgerf

shared/ssa/codeql/ssa/Ssa.qll

@@ -1907,7 +1907,10 @@ module Make<
         isUseStep = false
       )
       or
-      [nodeFrom, nodeFrom.(ExprPostUpdateNode).getPreUpdateNode()].(ReadNode).readsAt(bb, i, v) and
+      nodeFrom.(ReadNode).readsAt(bb, i, v) and
+      isUseStep = true
+      or
+      nodeFrom.(ExprPostUpdateNode).getPreUpdateNode().(ReadNode).readsAt(bb, i, v) and
       isUseStep = true
     }