Fix typo in check_config.h
diff --git a/include/mbedtls/bignum.h b/include/mbedtls/bignum.h
index 3b76c1c..c8d94c9 100644
--- a/include/mbedtls/bignum.h
+++ b/include/mbedtls/bignum.h
@@ -107,10 +107,10 @@
* architecture by defining MBEDTLS_HAVE_INT32 or MBEDTLS_HAVE_INT64
* respectively and undefining MBEDTLS_HAVE_ASM.
*
- * Double length integers (e.g. 128-bit in 64-bit architectures) can be
+ * Double-width integers (e.g. 128-bit in 64-bit architectures) can be
* disabled by defining MBEDTLS_NO_UDBL_DIVISION.
*
- * The double length integer types can be configured by defining
+ * The double-width integer types can be configured by defining
* MBEDTLS_TYPE_UDBL when the type cannot be automatically deduced by the
* library (e.g. the compiler is unknown). The definition of MBEDTLS_TYPE_UDBL
* must be a complete statement of the form: