Correct typos in comments

Author: per1234

examples/ts_wire/ts_wire.ino

@@ -80,7 +80,7 @@ void lsm6dsox_thread_func()
   {
     /* Sleep between 5 and 500 ms */
     rtos::ThisThread::sleep_for(rtos::Kernel::Clock::duration_u32(random(5,500)));
-    /* Try to read some data from the BMP3888. */
+    /* Try to read some data from the LSM6DSOX. */
     byte const who_am_i = lsm6dsox_read_reg(LSM6DSOX_WHO_AM_I_REG);
     /* Print thread id and chip id value to serial. */
     char msg[64] = {0};

src/spi/SpiDispatcher.cpp

@@ -81,7 +81,7 @@ void SpiDispatcher::begin()
 {
   SPI.begin();
   _thread.start(mbed::callback(this, &SpiDispatcher::threadFunc)); /* TODO: Check return code */
-  /* Is is necessary to wait until the SpiDispatcher::threadFunc()
+  /* It is necessary to wait until the SpiDispatcher::threadFunc()
    * has started, otherwise other threads might trigger IO requests
    * before this thread is actually running.
    */

src/wire/WireDispatcher.cpp

@@ -81,7 +81,7 @@ void WireDispatcher::begin()
 {
   Wire.begin();
   _thread.start(mbed::callback(this, &WireDispatcher::threadFunc)); /* TODO: Check return code */
-  /* Is is necessary to wait until the WireDispatcher::threadFunc()
+  /* It is necessary to wait until the WireDispatcher::threadFunc()
    * has started, otherwise other threads might trigger IO requests
    * before this thread is actually running.
    */