replace . with ; in proof

model/schedule/uni/schedule.v

@@ -161,9 +161,9 @@ Module UniprocessorSchedule.
             completed_by job_cost sched j t ->
             completed_by job_cost sched j t'.
         Proof.
-          unfold completed_by. move => t t' LE /eqP COMPt.
-          rewrite eqn_leq. apply/andP; split; first by apply H_completed_jobs.
-          rewrite- COMPt. by apply extend_sum.
+          unfold completed_by; move => t t' LE /eqP COMPt.
+          rewrite eqn_leq; apply/andP; split; first by apply H_completed_jobs.
+          rewrite- COMPt; by apply extend_sum.
         Qed.
 
         (* We also prove that a completed job cannot be scheduled. *)