It's controlled by the HISTCONTROL variable in bash. If it contains 'ignorespace' (or 'ignoreboth' to ignore duplicates as well). Check the man page for more details.
Anyone know why this incredible hack was introduced in hr first place? In my entire career this "feature" had only caused annoyance after copy-pasting a command.
Why not have a shell command called 'nohist' to wrap a command line?
Why not have a shell command called 'nohist' to wrap a command line?