Minor changes in catch command (mainly style)
Minor changes in catch command (mainly style)

k0kubun/byebug,yui-knk/byebug,ozydingo/byebug,guilherme/byebug,deivid-rodriguez/byebug,os97673/byebug,ozydingo/byebug,deivid-rodriguez/byebug,guilherme/byebug,icebreaker/byebug,scalp42/byebug,miamiruby/byebug,webdev1001/byebug,k0kubun/byebug,icebreaker/byebug,os97673/byebug,scalp42/byebug,k0kubun/byebug,yui-knk/byebug,yui-knk/byebug,saisai/byebug,webdev1001/byebug,miamiruby/byebug,deivid-rodriguez/byebug,saisai/byebug,guilherme/byebug