rleval

#; -*-shell-script-*-
# rleval COMMAND
# Eval command and write the output into readline line buffer.
rleval() {
    local a="${READLINE_LINE:0:$READLINE_POINT}"
    local b="${READLINE_LINE:$READLINE_POINT}"
    local s; s=$(eval "$@")    
    READLINE_LINE="${a}${s}${b}"
    let READLINE_POINT+=${#s}
}