Fix some style issues and comment typos
diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 2b4d353..916ff8d 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -286,7 +286,7 @@
* used to sign the certificate, CRL verification is skipped
* silently, that is *without* setting any flag.
*
- * \note The \c trust_ca list can contain two type of certificates:
+ * \note The \c trust_ca list can contain two types of certificates:
* (1) those of trusted root CAs, so that certificates
* chaining up to those CAs will be trusted, and (2)
* self-signed end-entity certificates to be trusted (for