Clarify docs for mbedtls_ct_memcpy_if
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/constant_time_internal.h b/library/constant_time_internal.h
index c15eaeb..959fbf9 100644
--- a/library/constant_time_internal.h
+++ b/library/constant_time_internal.h
@@ -428,7 +428,7 @@
* \param dest Secret. Destination pointer.
* \param src1 Secret. Pointer to copy from (if \p condition == MBEDTLS_CT_TRUE).
* This may be equal to \p dest, but may not overlap in other ways.
- * \param src2 Secret (contents only - may branch to test if src2 == NULL).
+ * \param src2 Secret (contents only - may branch to determine if this parameter is NULL).
* Pointer to copy from (if \p condition == MBEDTLS_CT_FALSE and \p src2 is not NULL). May be NULL.
* This may be equal to \p dest, but may not overlap it in other ways. It may overlap with \p src1.
* \param len Number of bytes to copy.