tutorial 1.1 not updated

[Former user]

in the section "Using a Backend-Specific Solver" of the page http://fenicsproject.org/documentation/tutorial/misc.html#linear-solvers-and-preconditioners, the code use the function

if not has_la_backend('Epetra')

and should be

has_linear_algebra_backend('Epetra'):

[Prof Garth Wells]

Duplicate of #4.