test the new feature introduced in yihui/knitr#963

023-engine-python.Rmd

@@ -14,6 +14,13 @@ print(x)
 print(x.split(' '))
 ```
 
+Or use the syntax ```` ```{python} ````:
+
+```{python}
+x = 'hello, python world!'
+print(x.split(' '))
+```
+
 If all the chunks below are python chunks, we can set the engine globally:
 
 ```{r setup, include=FALSE}

023-engine-python.md

@@ -25,6 +25,18 @@ print(x.split(' '))
 ## ['hello,', 'python', 'world!']
 ```
 
+Or use the syntax ```` ```{python} ````:
+
+
+```python
+x = 'hello, python world!'
+print(x.split(' '))
+```
+
+```
+## ['hello,', 'python', 'world!']
+```
+
 If all the chunks below are python chunks, we can set the engine globally:
 
 

029-engine-Rcpp.Rmd

@@ -5,11 +5,11 @@ library(knitr)
 opts_chunk$set(cache = TRUE) # because the compilation takes time, let's cache it
 ```
 
-When the chunk option `engine='Rcpp'` is specified, the code chunk will be compiled through **Rcpp** via `sourceCpp()`:
+When the chunk option `engine='Rcpp'` is specified (or you write the chunk header as ```` ```{Rcpp} ````), the code chunk will be compiled through **Rcpp** via `sourceCpp()`:
 
 Test for `fibonacci`:
 
-```{r fibCpp, engine='Rcpp'}
+```{Rcpp, fibCpp}
 #include <Rcpp.h>
 
 // [[Rcpp::export]]
@@ -28,7 +28,7 @@ fibonacci(20L)
 
 You can define multiple functions (or helper functions that are not exported) within Rcpp code chunks:
 
-```{r multipleCpp, engine='Rcpp'}
+```{Rcpp, multipleCpp}
 #include <Rcpp.h>
 using namespace Rcpp;
 
@@ -60,7 +60,7 @@ List lapplyCpp(List input, Function f) {
 
 If you want to link to code defined in another package (e.g **RcppArmadillo**) then you need to provide an `Rcpp::depends` attribute. For example:
 
-```{r lmCpp, engine='Rcpp'}
+```{Rcpp, lmCpp}
 // [[Rcpp::depends(RcppArmadillo)]]
 
 #include <RcppArmadillo.h>

029-engine-Rcpp.md

@@ -2,7 +2,7 @@
 
 
 
-When the chunk option `engine='Rcpp'` is specified, the code chunk will be compiled through **Rcpp** via `sourceCpp()`:
+When the chunk option `engine='Rcpp'` is specified (or you write the chunk header as ```` ```{Rcpp} ````), the code chunk will be compiled through **Rcpp** via `sourceCpp()`:
 
 Test for `fibonacci`: