Fix excess newline in split messages (#2)

* fix newline in new message

* fix spacing

* fix indent

* fix as what zaky wrote literally

Author: luqmanarifin

bot/common.go

@@ -21,11 +21,12 @@ func generateUpcomingContestsMessage(clistService *clist.Service, startFrom, sta
 	buffer.WriteString("\n")
 	var res []string
 	for _, contest := range contests {
-		str := fmt.Sprintf("\n- %s. Starts at %s. Link: %s", contest.Name, contest.StartDate.In(tz).Format("Jan 2 15:04 MST"), contest.Link)
-		if buffer.Len()+len(str) > limit {
+		str := fmt.Sprintf("- %s. Starts at %s. Link: %s", contest.Name, contest.StartDate.In(tz).Format("Jan 2 15:04 MST"), contest.Link)
+		if buffer.Len()+len(str)+1 > limit {
 			res = append(res, buffer.String())
 			buffer = *bytes.NewBufferString(str)
 		} else {
+			buffer.WriteString("\n")
 			buffer.WriteString(str)
 		}
 	}