Reword bignum sizes section
Signed-off-by: Werner Lewis <werner.lewis@arm.com>
diff --git a/library/bignum_mod_raw.h b/library/bignum_mod_raw.h
index bcdeaad..ddb2d09 100644
--- a/library/bignum_mod_raw.h
+++ b/library/bignum_mod_raw.h
@@ -27,8 +27,8 @@
* The initial content of output-only parameters is ignored.
* - \p T is a temporary storage area. The initial content of such a
* parameter is ignored and the final content is unspecified.
- * - **Bignum sizes**: bignum sizes are always expressed by the \p limbs
- * member of the modulus argument. Any bignum parameters must have the same
+ * - **Bignum sizes**: bignum sizes are usually expressed by the \c limbs
+ * member of the modulus argument. All bignum parameters must have the same
* number of limbs as the modulus. All bignum sizes must be at least 1 and
* must be significantly less than #SIZE_MAX. The behavior if a size is 0 is
* undefined.