Costmetic changes

arch/xtensa/include/esp32/irq.h

@@ -66,7 +66,7 @@
  *
  * REVISIT: In more architectures supported by NuttX, exception errors
  * tie into the normal interrupt handling via special IRQ numbers.  I
- * is still to be determined what will be done for the the ESP32.
+ * is still to be determined what will be done for the ESP32.
  */
 
 #define XTENSA_IRQ_TIMER0        0  /* INTERRUPT, bit 6 */

arch/xtensa/src/esp32/esp32_timerisr.c

@@ -212,11 +212,9 @@ void xtensa_timer_initialize(void)
 
   (void)irq_attach(XTENSA_IRQ_TIMER0, (xcpt_t)esp32_timerisr);
 
-  /* Enable the timer interrupt at the device level */
+  /* Enable the timer interrupt at the device level.  NOTE: It is un-necessary
+   * to call up_enable_irq() for timers.
+   */
 
   xtensa_enable_timer();
-
-  /* And enable the timer interrupt */
-
-  up_enable_irq(XTENSA_IRQ_TIMER0);
 }

include/ctype.h

@@ -70,7 +70,7 @@ static inline int isspace(int c)
 #else
 #  define isspace(c) \
     ((c) == ' '  || (c) == '\t' || (c) == '\n' || (c) == '\r' || \
-     (c) == '\f' || c== '\v')
+     (c) == '\f' || (c) == '\v')
 #endif
 
 /****************************************************************************

net/devif/ipv4_input.c

@@ -312,8 +312,6 @@ nullreturn:
  *         yet.  Currently useful for UDP when a packet arrives before a recv
  *         call is in place.
  *
- * Assumptions:
- *
  ****************************************************************************/
 
 int ipv4_input(FAR struct net_driver_s *dev)