Correct spelling mistakes in comments

include/ucore/dbuf.h

@@ -20,6 +20,7 @@ extern "C" {
  * to indicate you're done with the data.
  *
  * typically(but add error checking)
+ * @code
  * DBuf buf;
  * dbuf_init(&buf,4096);
  * for(;;) {
@@ -34,27 +35,30 @@ extern "C" {
  *      dbuf_take(&dbuf,linelen);
  *   }
  * }
+ * @endcode
  */
 typedef struct DBuf DBuf;
 struct DBuf {
     /** Start of user data */
 	unsigned char *start;
-    /** end of user data */
+    /** End of user data */
 	unsigned char *end;
     /** Start of underlying buffer. Internal use.*/
 	unsigned char *bufstart;
-    /** end of underlying buffer. Internal use.*/
+    /** End of underlying buffer. Internal use.*/
 	unsigned char *bufend;
 };
-/** free the internals of a DBuf, does not free buf itself. 
+/** Free the internals of a DBuf, does not free buf itself. 
  * Does nothing if buf == NULL
+ *
  * @param buf buffer to free
  */
 void uc_dbuf_free(DBuf *buf);
 
-/** Initialixe a dbuf. 
+/** Initialize a dbuf. 
 *
 * @param buf buffer to initialize
+* @param initlen inital capacity of the buffer
 * @return 0 on success
 */
 int uc_dbuf_init(DBuf *buf,size_t initlen);
@@ -68,12 +72,13 @@ size_t uc_dbuf_len(DBuf *buf);
 
 /** Allocated size of the buffer
  *
- * @buf buffer to get allocated length of
+ * @param buf buffer to get allocated length of
  * @return allocated length of the underlying buffer
  */
 size_t uc_dbuf_buflen(DBuf *buf);
 
 /** Get remaining space in the buffer
+ *
  * @param buf buffer
  * @return remaining space (after buf->end) in the buffer
  */
@@ -81,13 +86,14 @@ size_t uc_dbuf_remaining(DBuf *buf);
 
 /** ensure the buffer can hold 'capacity' no of bytes, 
  *
- * @param buffer
+ * @param buf buffer
  * @param capacity ensure there is room for capacity bytes after buf->end
- * @retun 0 on success
+ * @return 0 on success
  */
 int uc_dbuf_ensure(DBuf *buf,size_t capacity);
 
-/** trim the buffer to hold no more space than needed.
+/** Trim the buffer to hold no more space than needed.
+ *
  * @param buf buffer to trum
  */
 void uc_dbuf_trim(DBuf *buf);
@@ -99,12 +105,12 @@ void uc_dbuf_trim(DBuf *buf);
  * 
  * @param buf buffer
  * @param len length that was taken out of the buffer
- * @return 0 on success. Non-zero if @len is larger than the bufer capacity
+ * @return 0 on success. Non-zero if len is larger than the bufer capacity
  */
 int uc_dbuf_take(DBuf *buf,size_t len);
 
-/** indicate you've added 'len' bytes to the buffer
+/** Indicate you've added 'len' bytes to the buffer
- * Advances buf->end by @len bytes
+ * Advances buf->end by len bytes
  * User must always make sure (e.g. by using uc_dbuf_ensure)
  * that the buffer has the capacity to add @len bytes
  *