Hello,

when using the [ \t]* pattern in HISTIGNORE to ignore all command
beginning with a space, commands that begin with t won't be saved.

Example:
$ export HISTIGNORE="&:[bf]g:exit:[ \t]*:history*"
$ tar --help
$ history|tail

This prevent the use of this pattern but can also have an impact on all
patterns that include \... Maybe someone could imagine a test for that.

Best regards,
Michel