Minor change to documentation

doc/modbus_write_and_read_registers.txt

@@ -16,9 +16,9 @@ DESCRIPTION
 -----------
 The _modbus_write_and_read_registers()_ function shall write the content of the
 'write_nb' holding registers from the array 'src' to the address 'write_addr' of
-the remote device then shall read the content of the 'read_nb' holding registers to
+the remote device then shall read the content of the 'read_nb' holding registers
-the address 'read_addr' of the remote device. The result of reading is stored in
+to the address 'read_addr' of the remote device. The result of reading is stored
-'dest' array as word values (16 bits).
+in 'dest' array as word values (16 bits).
 
 You must take care to allocate enough memory to store the results in 'dest'
 (at least 'nb' * sizeof(uint16_t)).