[SPCA] Floating point: Fix stupid explanation

semester3/spca/parts/01_c/06_floating-point/04_rounding.tex

@@ -17,7 +17,8 @@ $$
     \underbrace{X_1X_2\ldots X_{k - 1}X_k}_\text{Sticky}
 $$
 where $n$ is the number of bits in the mantissa of the format (e.g. $3$ as in the above example of an $8$bit floating point number).
-Do keep in mind that when computing them in \lC\ in the standard way, they are inverted, i.e. we need a \texttt{!= 0} at the end to correct.
+Do keep in mind that when computing them in \lC\ using shifts that we can use \texttt{!= 0} at the end to change the bit representation to all $0$s with a $0$ or $1$ at the end
+(as opposed to possibly a one in a more significant bit).
 
 \begin{enumerate}
     \item \textbf{Guard Bit} $G$ is the least significant bit of the (rounded) result (i.e. it is $B_n$)