Remove extra error message

PUBLISHED_FROM=8b7fcfc1bc32ff9ff38e2904ddb730c83bf9fae4

docs/c-api/coap.h/mg_coap_add_option.md

@@ -8,6 +8,6 @@ signature: |
                                             size_t len);
 ---
 
-Adds a new option to mg_coap_message structure.
+Add new option to mg_coap_message structure.
 Returns pointer to the newly created option. 
 

docs/c-api/coap.h/mg_coap_free_options.md

@@ -6,6 +6,6 @@ signature: |
   void mg_coap_free_options(struct mg_coap_message *cm);
 ---
 
-Frees the memory allocated for options.
-If the cm paramater doesn't contain any option it does nothing. 
+Free the memory allocated for options,
+if cm paramater doesn't contain any option does nothing. 
 

docs/c-api/coap.h/mg_coap_parse.md

@@ -6,13 +6,13 @@ signature: |
   uint32_t mg_coap_parse(struct mbuf *io, struct mg_coap_message *cm);
 ---
 
-Parses CoAP message and fills mg_coap_message and returns cm->flags.
+Parse COAP message and fills mg_coap_message and returns cm->flags.
 This is a helper function.
 
-NOTE: usually CoAP works over UDP, so lack of data means format error.
-But, in theory, it is possible to use CoAP over TCP (according to RFC)
+NOTE: usually CoAP work over UDP, so lack of data means format error,
+but in theory it is possible to use CoAP over TCP (according to RFC)
 
-The caller has to check results and treat COAP_NOT_ENOUGH_DATA according to
+The caller have to check results and treat COAP_NOT_ENOUGH_DATA according to
 underlying protocol:
 
 - in case of UDP COAP_NOT_ENOUGH_DATA means COAP_FORMAT_ERROR,

docs/c-api/coap.h/mg_coap_send_ack.md

@@ -6,7 +6,7 @@ signature: |
   uint32_t mg_coap_send_ack(struct mg_connection *nc, uint16_t msg_id);
 ---
 
-Composes CoAP acknowledgement from `mg_coap_message`
-and sends it into `nc` connection.
+Compose CoAP acknowledgement from `mg_coap_message`
+and send it into `nc` connection.
 Return value: see `mg_coap_send_message()` 
 

docs/c-api/coap.h/mg_coap_send_message.md

@@ -7,9 +7,9 @@ signature: |
                                 struct mg_coap_message *cm);
 ---
 
-Composes a CoAP message from `mg_coap_message`
-and sends it into `nc` connection.
-Returns 0 on success. On error, it is a bitmask:
+Compose CoAP message from `mg_coap_message`
+and send it into `nc` connection.
+Return 0 on success. On error, it is a bitmask:
 
 - `#define MG_COAP_ERROR 0x10000`
 - `#define MG_COAP_FORMAT_ERROR (MG_COAP_ERROR | 0x20000)`

docs/c-api/coap.h/mg_set_protocol_coap.md

@@ -6,5 +6,5 @@ signature: |
   int mg_set_protocol_coap(struct mg_connection *nc);
 ---
 
-Sets CoAP protocol handler - triggers CoAP specific events. 
+Set CoAP protocol handler - trigger CoAP specific events