Fix some documentation typos/markup/duplication.
diff --git a/include/mbedtls/platform_util.h b/include/mbedtls/platform_util.h
index 604498a..8846f45 100644
--- a/include/mbedtls/platform_util.h
+++ b/include/mbedtls/platform_util.h
@@ -56,18 +56,10 @@
/**
* \brief User supplied callback function for parameter validation failure.
- *
- * When the MBEDTLS_CHECK_PARAMS option is enabled, the library
- * provides additional validation of all input parameters to
- * confirm that they conform to what the interface can accept.
- * For example - NULL paramater checks.
- *
- * These checks are designed to check programmatic issues in the
- * application software using Mbed TLS, or catch other runtime
- * errors which may be due to issues in the application software.
+ * See #MBEDTLS_CHECK_PARAMS for context.
*
* This function will be called unless an alternative treatement
- * is defined through the MBEDTLS_PARAM_FAILED() macro.
+ * is defined through the #MBEDTLS_PARAM_FAILED macro.
*
* This function can return, and the operation will be aborted, or
* alternatively, through use of setjmp()/longjmp() can resume