doc: fix or remove weird and invisble chars

drivers/mrf24j40/mrf24j40_getset.c

@@ -236,7 +236,7 @@ void mrf24j40_set_chan(mrf24j40_t *dev, uint8_t channel)
 
     mrf24j40_reg_write_long(dev, MRF24J40_REG_RFCON0, channel_value);
     /*
-     * Note:Perform an RF State Machine Reset (see Section 3.1 Reset)
+     * Note: Perform an RF State Machine Reset (see Section 3.1 Reset)
      * after a channel frequency change. Then, delay at least 192 us after
      * the RF State Machine Reset, to allow the RF circuitry to calibrate.
      */
@@ -373,7 +373,7 @@ void mrf24j40_set_option(mrf24j40_t *dev, uint16_t option, bool state)
                 tmp |= MRF24J40_TXMCR_NOCSMA;
                 /* MACMINBE<1:0>: The minimum value of the backoff exponent
                  * in the CSMA-CA algorithm. Note that if this value is set
-                 * to 0, collision avoidance is disabled. */
+                 * to 0, collision avoidance is disabled. */
                 mrf24j40_reg_write_short(dev, MRF24J40_REG_TXMCR, tmp);
                 break;
             case MRF24J40_OPT_PROMISCUOUS:

drivers/tcs37727/include/tcs37727-internal.h

@@ -102,10 +102,10 @@ extern "C"
 #define TCS37727_CONTROL_PDRIVE_25      0x08 /**< 25 mA LED Drive Strength */
 #define TCS37727_CONTROL_PDRIVE_12      0x0C /**< 12.5 mA LED Drive Strength */
 #define TCS37727_CONTROL_PDRIVE_MASK    0x0C /**< PDRIVE Mask */
-#define TCS37727_CONTROL_AGAIN_1        0x00 /**< 1 × gain RGBC Gain Value */
-#define TCS37727_CONTROL_AGAIN_4        0x01 /**< 4 × gain RGBC Gain Value */
-#define TCS37727_CONTROL_AGAIN_16       0x02 /**< 16 × gain RGBC Gain Value */
-#define TCS37727_CONTROL_AGAIN_60       0x03 /**< 60 × gain RGBC Gain Value */
+#define TCS37727_CONTROL_AGAIN_1        0x00 /**<  1x gain RGBC Gain Value */
+#define TCS37727_CONTROL_AGAIN_4        0x01 /**<  4x gain RGBC Gain Value */
+#define TCS37727_CONTROL_AGAIN_16       0x02 /**< 16x gain RGBC Gain Value */
+#define TCS37727_CONTROL_AGAIN_60       0x03 /**< 60x gain RGBC Gain Value */
 #define TCS37727_CONTROL_AGAIN_MASK     0x03 /**< AGAIN Mask */
 /** @} */
 

pkg/openthread/include/ot.h

@@ -17,7 +17,7 @@
  *
  * @file
  *
- * @author  José Ignacio Alamos <jialamos@uc.cl>
+ * @author  José Ignacio Alamos <jialamos@uc.cl>
  */
 
 #ifndef OT_H