Misc documentation fixes/improvements.
diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index 3b486cf..9ec33da 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -127,7 +127,7 @@
  */
 typedef struct mbedtls_pk_context
 {
-    const mbedtls_pk_info_t *   pk_info; /**< Public key informations        */
+    const mbedtls_pk_info_t *   pk_info; /**< Public key information         */
     void *                      pk_ctx;  /**< Underlying public key context  */
 } mbedtls_pk_context;
 
@@ -137,7 +137,7 @@
  */
 typedef struct
 {
-    const mbedtls_pk_info_t *   pk_info; /**< Public key informations        */
+    const mbedtls_pk_info_t *   pk_info; /**< Public key information         */
     void *                      rs_ctx;  /**< Underlying restart context     */
 } mbedtls_pk_restart_ctx;
 #else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */