SUBSHELL-VAR (CHECK 69):
- Skip variables only used for writing to files (echo ... >> pattern)
- File writes persist even in subshells, so these are safe
NULL (CHECK 47):
- Skip echo/print_info/print_warning/print_error/printf statements
- These are displaying example commands, not executing them
ESCAPE (CHECK 66):
- Skip filename variables after redirection operators (>, >>, 2>)
- Example: grep ... > "$output_file" is writing TO file, not reading FROM it
These improvements reduce false positive rate significantly.
cschantz
4ab211fd26