CTR_DRBG documentation: further wording improvements
diff --git a/include/mbedtls/ctr_drbg.h b/include/mbedtls/ctr_drbg.h
index 892fd62..e62f115 100644
--- a/include/mbedtls/ctr_drbg.h
+++ b/include/mbedtls/ctr_drbg.h
@@ -1,7 +1,8 @@
/**
* \file ctr_drbg.h
*
- * \brief This file contains CTR_DRBG definitions and functions.
+ * \brief This file contains definitions and functions for the
+ * CTR_DRBG pseudorandom generator.
*
* CTR_DRBG is a standardized way of building a PRNG from a block-cipher
* in counter mode operation, as defined in <em>NIST SP 800-90A:
@@ -410,7 +411,7 @@
* \param p_rng The CTR_DRBG context. This must be a pointer to a
* #mbedtls_ctr_drbg_context structure.
* \param output The buffer to fill.
- * \param output_len The length of the buffer.
+ * \param output_len The length of the buffer in bytes.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED or