fix(tansa): Add small improvement on creating DiffMatchPatch object only once
fix(tansa): Add small improvement on creating DiffMatchPatch object only once

superdesk/superdesk-client-core,superdesk/superdesk-client-core,pavlovicnemanja/superdesk-client-core,marwoodandrew/superdesk-client-core,pavlovicnemanja/superdesk-client-core,pavlovicnemanja/superdesk-client-core,petrjasek/superdesk-client-core,mugurrus/superdesk-client-core,mdhaman/superdesk-client-core,ioanpocol/superdesk-client-core,marwoodandrew/superdesk-client-core,mdhaman/superdesk-client-core,mdhaman/superdesk-client-core,ioanpocol/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,marwoodandrew/superdesk-client-core,petrjasek/superdesk-client-core,mugurrus/superdesk-client-core,petrjasek/superdesk-client-core,jerome-poisson/superdesk-client-core,jerome-poisson/superdesk-client-core,pavlovicnemanja/superdesk-client-core,mugurrus/superdesk-client-core,mugurrus/superdesk-client-core,jerome-poisson/superdesk-client-core,superdesk/superdesk-client-core,pavlovicnemanja/superdesk-client-core,petrjasek/superdesk-client-core,mdhaman/superdesk-client-core,jerome-poisson/superdesk-client-core,marwoodandrew/superdesk-client-core,mdhaman/superdesk-client-core,ioanpocol/superdesk-client-core,ioanpocol/superdesk-client-core,superdesk/superdesk-client-core,ioanpocol/superdesk-client-core,marwoodandrew/superdesk-client-core,jerome-poisson/superdesk-client-core