Fixed typo in vignette: num_cores argument was missing from fit_model()

Author: stephaniereinders

vignettes/handwriter.Rmd

@@ -97,7 +97,8 @@ In this example, we use 4000 MCMC iterations for the model. The inputs `writer_i
 model <- fit_model(template_dir = "path/to/main_dir", 
                    model_images_dir = "path/to/main_dir/data/model_docs",
                    num_iters = 4000, 
-                   num_chains = 1, 
+                   num_chains = 1,
+                   num_cores = 2,
                    writer_indices = c(7, 10), 
                    doc_indices = c(11, 14))
 ```