fix episode 3 reversion

Author: albhasan

episodes/03-raster-reproject-in-r.Rmd

@@ -106,8 +106,7 @@ Let's try to plot the DTM on its own to make sure there are data there.
 ```{r plot-DTM}
 ggplot() +
 geom_raster(data = DTM_HARV_df,
-    aes(x = x, y = y,
-    fill = HARV_dtmCrop)) +
+    aes(x = x, y = y, fill = HARV_dtmCrop)) +
 scale_fill_gradientn(name = "Elevation", colors = terrain.colors(10)) + 
 coord_quickmap()
 ```