eshell-stringify-t

eshell-stringify-t is a variable defined in `esh-util.el'.
Its value is

t

Documentation:
If non-nil, the string representation of t is 't'.
If nil, t will be represented only in the exit code of the function,
and not printed as a string. This causes Lisp functions to behave
similarly to external commands, as far as successful result output.

You can customize this variable.