Rubocop: correct Style issues

lib/analysis/cache_persistence_analysis.rb

lib/analysis/cache_region_analysis.rb

lib/analysis/dfa.rb

lib/analysis/ipet.rb

lib/analysis/trace.rb

lib/analysis/transform.rb

lib/analysis/wca.rb

lib/arch/patmos.rb

lib/core/arch.rb

lib/core/context.rb

lib/core/pml.rb

lib/core/pmlbase.rb

lib/core/programinfo.rb

lib/core/utils.rb

lib/ext/ait.rb

lib/ext/patmos-clang-wcet.rb

lib/tools/extract-symbols.rb

lib/tools/interact.rb

lib/tools/pml.rb

lib/tools/pmlmod.rb