bin: Minor changes to backup script
bin: Minor changes to backup script

* Use expanded options for consistency and clarity.
* Fix indentation.
* Move `logger` path into a variable.

micahwood/linux-dotfiles,sdillingham/dotfiles,lgaechter/dotfiles,marc0uk/dotfiles,pmacom/dotfiles,seiryu9/dotfiles,senorflor/dotfiles,codfish/dotfiles,pertoyra/dotfiles,bronxct1/dotfiles,Gastove/dotfiles,micahwood/linux-dotfiles,micahwood/linux-dotfiles,Stubby/dotfiles,bronxct1/dotfiles,jmyser/dotfiles,nick-thompson/dotfiles,seiryu9/dotfiles,senorflor/linux-dotfiles,SBoudrias/dotfiles,micahwood/linux-dotfiles,micahwood/linux-dotfiles,intiocean/dotfiles,saclark/dotfiles,Stubby/dotfiles,necolas/dotfiles,SiTaggart/dotfiles,codfish/dotfiles