eps8266/general: Fix typo in recent example.

pfalcon · pfalcon · commit 205c368fa1e0 · 2017-07-21T12:08:18.000+03:00
diff --git a/docs/esp8266/general.rst b/docs/esp8266/general.rst
@@ -144,4 +144,4 @@ or by an exeption, for example using try/finally::
     try:
         # Use sock
     finally:
-        s.close()
+        sock.close()
