[basic.fundamental] p5

Each value x of an unsigned integer type with width N has a unique representation x = x₀2⁰ + x₁2¹ + ... + x_N-12^N-1, where each coefficient x_i is either 0 or 1; this is called the base-2 representation of x. The base-2 representation of a value of signed integer type is the base-2 representation of the congruent value of the corresponding unsigned integer type.

Change the emphasized part to

For value x, the value of the corresponding signed integer type that is congruent to x modulo 2^N has the same base-2 representation as that of x.

This is easier to read and looks stricter.