docs: Fix spelling in various parts of the docs.

docs/esp32/quickref.rst

@@ -77,7 +77,7 @@ The :mod:`network` module::
     wlan.scan()             # scan for access points
     wlan.isconnected()      # check if the station is connected to an AP
     wlan.connect('essid', 'password') # connect to an AP
-    wlan.config('mac')      # get the interface's MAC adddress
+    wlan.config('mac')      # get the interface's MAC address
     wlan.ifconfig()         # get the interface's IP/netmask/gw/DNS addresses
 
     ap = network.WLAN(network.AP_IF) # create access-point interface
@@ -203,7 +203,7 @@ Use the :ref:`machine.ADC <machine.ADC>` class::
     adc = ADC(Pin(32))          # create ADC object on ADC pin
     adc.read()                  # read value, 0-4095 across voltage range 0.0v - 1.0v
 
-    adc.atten(ADC.ATTN_11DB)    # set 11dB input attentuation (voltage range roughly 0.0v - 3.6v)
+    adc.atten(ADC.ATTN_11DB)    # set 11dB input attenuation (voltage range roughly 0.0v - 3.6v)
     adc.width(ADC.WIDTH_9BIT)   # set 9 bit return values (returned range 0-511)
     adc.read()                  # read value using the newly configured attenuation and width
 
@@ -257,7 +257,7 @@ class::
     spi.init(baudrate=200000) # set the baudrate
 
     spi.read(10)            # read 10 bytes on MISO
-    spi.read(10, 0xff)      # read 10 bytes while outputing 0xff on MOSI
+    spi.read(10, 0xff)      # read 10 bytes while outputting 0xff on MOSI
 
     buf = bytearray(50)     # create a buffer
     spi.readinto(buf)       # read into the given buffer (reads 50 bytes in this case)