fix two oeis related doctests

Author: fchapoton

src/doc/en/developer/coding_basics.rst

@@ -1302,9 +1302,7 @@ framework. Here is a comprehensive list:
     For lines that require an internet connection::
 
        sage: oeis(60843)                 # optional - internet
-       A060843: Busy Beaver problem: a(n) = maximal number of steps that an
-       n-state Turing machine can make on an initially blank tape before
-       eventually halting.
+       A060843: ...
 
   - **known bugs:** For lines that describe known bugs, you can use ``# optional - bug``,
     although ``# known bug`` is preferred.

src/sage/combinat/quickref.py

@@ -4,8 +4,7 @@
 Integer Sequences::
 
     sage: s = oeis([1,3,19,211]); s                         # optional - internet
-    0: A000275: Coefficients of a Bessel function (reciprocal of J_0(z));
-                also pairs of permutations with rise/rise forbidden.
+    0: A000275: ...
     sage: s[0].programs()                                   # optional - internet
     [('maple', ...),
      ('mathematica', ...),