doc: Highlight syntax of code examples

diff --git a/README b/README
index 9b6f1b1d50597c08f9603ae7d5c8e7fbe70c0e18..ab53ff84b007582475c519453edce3521c94b3ff 100644 (file)
--- a/README
+++ b/README
@@ -93,19 +93,19 @@ factorial.c
 -----------
 
 .. include:: sample/factorial.c
-    :literal:
+    :code: c
 
 factorial_test.c
 ----------------
 
 .. include:: sample/factorial_test.c
-    :literal:
+    :code: c
 
 exception_test.cpp
 ------------------
 
 .. include:: sample/exception_test.cpp
-    :literal:
+    :code: c++
 
 
 Concepts