Put footnotes on a single line

Author: mcol

src/reference-manual/analysis.Rmd

@@ -85,9 +85,8 @@ $\theta$ and real- and discrete-valued data $y$.^[Using vectors simplifies high
 
 An MCMC *sample* consists of a set of a sequence of $M$ Markov chains,
 each consisting of an ordered sequence of $N$ *draws* from the
-posterior.^[The structure is assumed to be rectangular;  in the
-future, this needs to be generalized to ragged samples.]  The sample
-thus consists of $M \times N$ draws from the posterior.
+posterior.^[The structure is assumed to be rectangular; in the future, this needs to be generalized to ragged samples.]
+The sample thus consists of $M \times N$ draws from the posterior.
 
 
 ### Potential Scale Reduction
@@ -189,10 +188,7 @@ quantities.  The short answer is "no," but this is elaborated
 further in this section.
 
 For example, consider the value `lp__`, which is the log posterior
-density (up to a constant).^[The `lp__` value also represents the
-potential energy in the Hamiltonian system and is rate bounded by the
-randomly supplied kinetic energy each iteration, which follows a
-Chi-square distribution in the number of parameters.]
+density (up to a constant).^[The `lp__` value also represents the potential energy in the Hamiltonian system and is rate bounded by the randomly supplied kinetic energy each iteration, which follows a Chi-square distribution in the number of parameters.]
 
 It is thus a mistake to declare convergence in any practical sense if
 `lp__` has not converged, because different chains are really in

src/reference-manual/statements.Rmd

@@ -800,11 +800,7 @@ Such reassignment is not permitted in BUGS.  In BUGS, for loops are
 declarative, defining plates in directed graphical model notation,
 which can be thought of as repeated substructures in the graphical
 model.  Therefore, it is illegal in BUGS or JAGS to have a for loop
-that repeatedly reassigns a value to a variable.^[A programming idiom
-in BUGS code simulates a local variable by replacing `theta` in the
-above example with `theta[n]`, effectively creating `N` different
-variables, `theta[1]`, ..., `theta[N]`.  Of course, this is not a hack
-if the value of `theta[n]` is required for all `n`.]
+that repeatedly reassigns a value to a variable.^[A programming idiom in BUGS code simulates a local variable by replacing `theta` in the above example with `theta[n]`, effectively creating `N` different variables, `theta[1]`, ..., `theta[N]`.  Of course, this is not a hack if the value of `theta[n]` is required for all `n`.]
 
 In Stan, assignments are executed in the order they are encountered.
 As a consequence, the following Stan program has a very different