Increase the usage of combined assignment operators

[elfring]

:eyes: Some source code analysis tools can help to find opportunities for improving software components. :thought_balloon: I propose to increase the usage of combined operators accordingly.

Would you like to integrate anything from a transformation result which can be generated by a command like the following? (:point_right: Please check also for questionable change suggestions because of an evolving search pattern.)

lokal$ perl -p -i.orig -0777 -e 's/(?<target>\$\S+)\s*=\s*\k<target>[ \t]*(?<operator>[+%^.x]|-(?!>)|&(?:&|.)?|\|(?:\||.)?|\*\*?|\/\/?|<<|>>|^.)/$+{target} $+{operator}=/gm' $(find ~/Projekte/Monitorix/lokal -name '*.pl' -o -name '*.pm')