spelling: fix seperate -> separate

include/coap2/debug.h

@@ -169,7 +169,7 @@ size_t coap_print_addr(const struct coap_address_t *address,
  * Percentage : 0% to 100%.  Use the specified probability.
  * 0% is send all packets, 100% is drop all packets.
  *
- * List: A comma seperated list of numbers or number ranges that are the
+ * List: A comma separated list of numbers or number ranges that are the
  * packets to drop.
  *
  * @param loss_level The defined loss level (percentage or list).

include/coap2/resource.h

@@ -161,7 +161,7 @@ coap_resource_t *coap_resource_init(coap_str_const_t *uri_path,
  *       a new one overrides the previous definition.
  *
  * Note: It is not possible to observe the unknown resource with a GET request
- *       - a seperate resource needs to be reated by the PUT (or POST) handler,
+ *       - a separate resource needs to be reated by the PUT (or POST) handler,
  *       and make that resource observable.
  *
  * This function returns the new coap_resource_t object.

man/coap_recovery.txt.in

@@ -77,7 +77,7 @@ but at that point COAP_NACK_TOO_MANY_RETRIES gets raised in the nack_handler
 (if defined). Note that the sum of the seconds is 93 matching RFC7252.
 ----
 
-It should be noted that these retries are seperate from the DTLS or TLS
+It should be noted that these retries are separate from the DTLS or TLS
 encrypted session setup retry timeouts. For DTLS, the initial requesting
 packet will get sent max_retransmit times before reporting failure.
 For TLS the initial TCP connection will timeout before reporting failure.

src/net.c

@@ -1943,7 +1943,7 @@ handle_request(coap_context_t *context, coap_session_t *session, coap_pdu_t *pdu
        *   coap_register_handler(r, COAP_REQUEST_DELETE, hnd_delete_unknown);
        *   coap_add_resource(ctx, r);
        *
-       * Note: It is not possible to observe the unknown_resource, a seperate
+       * Note: It is not possible to observe the unknown_resource, a separate
        *       resource must be created (by PUT or POST) which has a GET
        *       handler to be observed
        */