edited explanation of "constraint" in sample batinp file (ldas_setup)

Author: gmao-rreichle

GEOSldas_App/ldas_setup

@@ -1570,16 +1570,17 @@ class LDASsetup:
                         '.'.join([expid, 'ldas_err', myDateTime, 'txt']),
                         ]),
                 self.rundir)
+
         constraint = '"[mil|cas]"'
-        if self.GEOS_SITE == "NAS":
-          constraint = 'cas_ait'
+        if self.GEOS_SITE == "NAS" :
+            constraint = 'cas_ait'
 
         if 'constraint' in self.optRmInp:
-          constraint = self.optRmInp['constraint']
+            constraint = self.optRmInp['constraint']
 
         SBATCHQSUB = 'sbatch'
         if self.GEOS_SITE == 'NAS':
-          SBATCHQSUB = 'qsub'
+            SBATCHQSUB = 'qsub'
 
         DETECTED_MPI_STACK = "@MPI_STACK@"
 
@@ -1861,7 +1862,7 @@ def _printRmInputKeys(rqdRmInpKeys, optRmInpKeys):
     print ('# - writers-per-node = tasks per oserver_node for writing ( default is 5, for future use ),')
     print ('#      IMPORTANT REQUIREMENT: total #writers = writers-per-node * oserver_nodes >= 2')
     print ('#      Jobs will hang when oserver_nodes = writers-per-node = 1.')
-    print ('# - constraint       = mil ; submit the job to a particular machine, default is "[mil|cas]")
+    print ('# - constraint       = name of chip set(s) (NCCS default is "[mil|cas]", NAS default is "cas_ait").')
     print ('#')
     for key in optRmInpKeys:
         print ('#'+key + ':')