Fix warnings caused by unescaped special doxygen chars

core/ctk/ctk-draw.h

@@ -319,7 +319,7 @@ extern unsigned char ctk_draw_windowborder_width,
 /**
  * The character used for the Return/Enter key.
  *
- * \define #define CH_ENTER '\n'
+ * \#define CH_ENTER '\n'
  */
 
 /**

core/net/ipv6/sicslowpan.h

@@ -234,7 +234,7 @@ struct sicslowpan_addr_context {
  * \brief check whether we can compress the IID in
  * address 'a' to 16 bits.
  * This is used for unicast addresses only, and is true
- * if the address is on the format <PREFIX>::0000:00ff:fe00:XXXX
+ * if the address is on the format \<PREFIX\>::0000:00ff:fe00:XXXX
  * NOTE: we currently assume 64-bits prefixes
  */
 #define sicslowpan_is_iid_16_bit_compressable(a) \

core/sys/cc.h

@@ -133,7 +133,7 @@
  * strings.
  *
  * We need use two macros (CC_CONCAT and CC_CONCAT2) in order to allow
- * concatenation of two #defined macros.
+ * concatenation of two \#defined macros.
  */
 #define CC_CONCAT(s1, s2) CC_CONCAT2(s1, s2)