Fix STATE documentation trailing whitespace

Author: lukelowry

GridKit/Model/PhasorDynamics/STATE.md

@@ -92,15 +92,15 @@ This is where we store stateful information like connectivity and dispatch, whic
 # Migration
 
 `Bus`:
-- Remove the `init` fields from `Bus` in the `INPUT_FORMAT.md` 
+- Remove the `init` fields from `Bus` in the `INPUT_FORMAT.md`
 - make an interface `setVr(..)` and `setVi(..)`.
 
 `Branch`:
 - Remove `tap` and `phase` as parameters
 - make an interface `setTap(..)` and `setPhase(..)`.
-- add `setOpen(..)` interface 
+- add `setOpen(..)` interface
 
 `LoadZIP`, `GENROU`, `GENSAL`, `GenClassical`:
 - Remove `p0` and `q0` as parameters
 - make an interface `setP(..)` and `setQ(..)`.
-- add `setOnline(..)` interface 
+- add `setOnline(..)` interface