Fix typesetting of one file.

Author: williamstein

src/sage/schemes/elliptic_curves/ell_rational_field.py

@@ -3259,7 +3259,7 @@ def sha_an_padic(self, p, prec=0):
             1 + O(11)
 
         NOTE: the following doctest is DISABLED. When I put in the fix for
-        trac #635, this strangely switched sign to become 40 + O(41).
+        trac \#635, this strangely switched sign to become 40 + O(41).
         I'm not sure whether this indicates a bug, possibly a normalisation issue.
             sage.: EllipticCurve('123a1').sha_an_padic(41) #rank 1    (long time)
             1 + O(41)