fixed typo

offline.py

@@ -31,7 +31,7 @@ def Solve(images, blackouts):
 
     """"DECISION VARIABLES"""
     # objective function to minimize
-    makepsan = model.addVar(lb=0, vtype=GRB.CONTINUOUS)
+    makespan = model.addVar(lb=0, vtype=GRB.CONTINUOUS)
 
     # Processing Volume = sum of length of images transmitted in whitebox t
     PV_t = model.addVars(whitebox_count, lb=0, vtype=GRB.CONTINUOUS)
@@ -44,10 +44,10 @@ def Solve(images, blackouts):
 
     """CONSTRAINTS"""
     # minimize makespan
-    model.setObjective(makepsan, GRB.MINIMIZE)
+    model.setObjective(makespan, GRB.MINIMIZE)
 
     # end time is when the last filled whitebox finished processing all its images
-    model.addConstrs((makepsan >= (PV_t[t] + wb_t[t][0]) * (1-Xfree_t[t])
+    model.addConstrs((makespan >= (PV_t[t] + wb_t[t][0]) * (1-Xfree_t[t])
                       for t in range(whitebox_count)))
 
     # sets Xfree_t to be (at least) 1 if there is no image in the whitebox