- fix so PDF figure is shown

- lang fix

Author: torkar

src/stan-users-guide/odes.Rmd

@@ -72,7 +72,7 @@ real[] sho(real t,        // time
 ```
 
 The function takes in a time `t` (a real value), a a system state
-`y` (real array), system parameters `theta` (a real array),
+`y` (a real array), system parameters `theta` (a real array),
 along with real data in variable `x_r` (a real array) and
 integer data in variable `x_i` (an integer array).  The system
 function returns the array of derivatives of the system state with
@@ -200,7 +200,7 @@ oscillator trajectory plots.
 Trajectory of the simple harmonic oscillator given parameter $\theta=0.15$ and initial condition $y(t=0) = (1,0)$ with additional independent $\textsf{normal}(0,0.1)$ measurement error in both dimensions.
 
 ```{r fig.cap="Simple harmonic oscillator trajectory"}
-knitr::include_graphics("img/sho-ode-trajectory.pdf", auto_pdf = TRUE)
+knitr::include_graphics("img/sho-ode-trajectory.pdf")
 ```
 <a name="id:sho-trajectory.figure"></a>