Update operator names in docs

docs/operators.md

@@ -18,11 +18,11 @@ of these and other valid operators are stated below.
 `cube`,
 `exp`,
 `abs`,
-`log_abs` (=log(abs(x) + 1e-8)),
-`log10_abs`,
-`log2_abs`,
-`log1p_abs` (=log(abs(x) + 1)),
-`sqrt_abs` (=sqrt(abs(x)))
+`log`,
+`log10`,
+`log2`,
+`log1p`,
+`sqrt`,
 `sin`,
 `cos`,
 `tan`,
@@ -31,7 +31,7 @@ of these and other valid operators are stated below.
 `tanh`,
 `atan`,
 `asinh`,
-`acosh_abs`,
+`acosh`,
 `atanh_clip` (=atanh((x+1)%2 - 1)),
 `erf`,
 `erfc`,