Update Installation.md

doc/Installation.md

@@ -3,7 +3,7 @@ Installation instructions
 We provide a *cmake*-based configuration and use the `dunecontrol` build system.
 Simply run
 
-```
+```bash
 dunecontrol --current all
 ```
 
@@ -34,7 +34,7 @@ If your MTL4 installation is not found by default, you have to specify the path,
 where the file `MTLConfig.cmake` is found, here called `MTL_ROOT`. Then simply use
 `dunecontrol` to configure and `cmake` to build:
 
-```
+```bash
 CMAKE_FLAGS="-DMTL_DIR:PATH=[MTL_ROOT]" dunecontrol --current all
 ```