Merge pull request #173 from gingemonster/master

fixing more help broken links

libs/microbit/input.cpp

@@ -284,7 +284,7 @@ namespace input {
      * Sets the accelerometer sample range in gravities.
      * @param range a value describe the maximum strengh of acceleration measured
      */
-    //% help=input/set-accelerator-range
+    //% help=input/set-accelerometer-range
     //% blockId=device_set_accelerometer_range block="set accelerometer|range %range" icon="\uf135"
     //% weight=5
     void setAccelerometerRange(AcceleratorRange range) {

libs/microbit/pins.cpp

@@ -159,7 +159,7 @@ namespace pins {
     /**
     * Gets the duration of the last pulse in micro-seconds. This function should be called from a ``onPulsed`` handler.
     */
-    //% help=pins/pulse-micros
+    //% help=pins/pulse-duration
     //% blockId=pins_pulse_duration block="pulse duration (µs)"
     //% weight=21
     int pulseDuration() {

libs/microbit/serial.cpp

@@ -61,7 +61,7 @@ namespace serial {
     * @param baud the new baud rate. eg: 115200
     */
     //% weight=10
-    //% help=serial/redirect
+    //% help=serial/redirect-to
     //% blockId=serial_redirect block="serial redirect to|TX %tx|RX %rx|at baud rate %rate"
     //% blockExternalInputs=1
     void redirect(SerialPin tx, SerialPin rx, BaudRate rate) {