Update readme.md

doc/readme.md

@@ -14,9 +14,9 @@
 
 * [API Architecture](api_arch.md) - Overview of the high-level concepts
 * [C API](../include/librealsense2) - With doxygen-style API comments
-* To build documentation locally from sources, on Ubuntu run the following commands:
-  * `sudo apt-get install doxygen`
-  * `doxygen doc/doxygen/doxyfile`
+  * To build documentation locally from sources, on Ubuntu run the following commands:
+    * `sudo apt-get install doxygen`
+    * `doxygen doc/doxygen/doxyfile`
   * Please also refer to [API How-To](https://github.com/IntelRealSense/librealsense/wiki/API-How-To) for further doc how to use the APIs
 * [Frame Management](frame_lifetime.md) - Frame Memory Management, Threading Model and Synchronization
 * [Frame Metadata](frame_metadata.md) - Support for frame-metadata attributes