[rubis] (change:minor) Use regex in place of sequential string search also for extracting page number.
[rubis] (change:minor) Use regex in place of sequential string search also for extracting page number.

sguazt/rain-workload-toolkit,yungsters/rain-workload-toolkit,sguazt/rain-workload-toolkit,sguazt/rain-workload-toolkit,yungsters/rain-workload-toolkit,yungsters/rain-workload-toolkit