Merge lp:~martinal/fenics-book/final-15 into lp:fenics-book

[Martin Sandve Alnæs]

Typos in chapter 15 (syfi).

=== modified file 'tex/15.tex'
--- tex/15.tex	2011-10-10 14:02:03 +0000
+++ tex/15.tex	2011-10-12 10:13:26 +0000
@@ -284,8 +284,8 @@
 sfc -w1  -ogenerated_code Poisson.ufl
 \end{bash}
 Here, \emp{-w1} means that \dolfin{} wrappers are generated, while
-\emp{-ogenerate\_code} means that the generated code should be
-located in the directory \emp{generate\_code}. Notice that the flags
+\emp{-ogenerated\_code} means that the generated code should be
+located in the directory \emp{generated\_code}. Notice that the flags
 and corresponding options are not separated by spaces. A complete
 list of options is obtained with \emp{sfc -h}.  The generated code can be
 utilized in DOLFIN in a standard fashion.  For a complete example consider
@@ -499,7 +499,7 @@
 using quadrature where the generated code involves multiple loops and
 quite a few temporary variables. To generate quadrature based code,
 the computational graph algorithms from UFL (in particular the class
-\emp{ufl.Graph}) are used to split the expression tree into smaller
+\emp{ufl.algorithms.Graph}) are used to split the expression tree into smaller
 subexpressions.  \sfc{} makes GiNaC symbols that represent temporary
 variables for all subexpressions.  To place the temporary variables
 inside the correct loops in the generated code, the computational