docs: Fix spelling in various parts of the docs.

docs/esp8266/general.rst

@@ -140,7 +140,7 @@ The above may also happen after an application terminates and quits to the REPL
 for any reason including an exception. Subsequent arrival of data provokes the
 failure with the above error message repeatedly issued. So, sockets should be
 closed in any case, regardless whether an application terminates successfully
-or by an exeption, for example using try/finally::
+or by an exception, for example using try/finally::
 
     sock = socket(...)
     try:

docs/esp8266/quickref.rst

@@ -188,7 +188,7 @@ 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)