PR IntelRealSense#10893 from 35selim: Improved/fixed installation.md …

…syntax

Improved/fixed installation.md syntax

doc/installation.md

@@ -37,26 +37,25 @@ The scripts and commands below invoke `wget, git, add-apt-repository` which may
      Unplug any connected Intel RealSense camera.<br />  
 
   2. Install the core packages required to build *librealsense* binaries and the affected kernel modules:  
-
-    `sudo apt-get install git libssl-dev libusb-1.0-0-dev libudev-dev pkg-config libgtk-3-dev`  <br /><br />
-    Distribution-specific packages:  <br />
+ 
+     `sudo apt-get install git libssl-dev libusb-1.0-0-dev libudev-dev pkg-config libgtk-3-dev`  <br /><br />
+     Distribution-specific packages:<br />
      * Ubuntu 14 or when running Ubuntu 16.04 live-disk:<br />
       `./scripts/install_glfw3.sh`  <br />
 
      * Ubuntu 16:<br />
-      `sudo apt-get install libglfw3-dev`<br />
+      `sudo apt-get install libglfw3-dev`  <br />
 
      * Ubuntu 18/20:<br />
       `sudo apt-get install libglfw3-dev libgl1-mesa-dev libglu1-mesa-dev at`  <br /><br />
 
 > **Cmake Note**: certain librealsense CMAKE flags (e.g. CUDA) require version 3.8+ which is currently not made available via apt manager for Ubuntu LTS.   
     Go to the [official CMake site](https://cmake.org/download/) to download and install the application  
 
-  **Note**: 
-
-    * on graphic sub-system utilization:<br />
+  **Note**: <br />
+  * on graphic sub-system utilization:<br />
        *glfw3*, *mesa* and *gtk* packages are required if you plan to build the SDK's OpenGL-enabled examples. The *librealsense* core library and a range of demos/tools are designed for headless environment deployment.
-    * `libudev-dev` installation is optional but recommended, when the `libudev-dev` is installed the SDK will use an event-driven approach for triggering USB detection and enumeration, if not the SDK will use a timer polling approach which is less sensitive for device detection.
+  * `libudev-dev` installation is optional but recommended, when the `libudev-dev` is installed the SDK will use an event-driven approach for triggering USB detection and enumeration, if not the SDK will use a timer polling approach which is less sensitive for device detection.
 
   3. Run Intel Realsense permissions script from librealsense root directory:<br />
     `./scripts/setup_udev_rules.sh`  
@@ -65,12 +64,11 @@ The scripts and commands below invoke `wget, git, add-apt-repository` which may
     *`./scripts/setup_udev_rules.sh --uninstall`*
 
   4. Build and apply patched kernel modules for: <br />
-
-    * **Ubuntu 14/16/18/20 with LTS kernel**
+   * **Ubuntu 14/16/18/20 with LTS kernel**<br />
       `./scripts/patch-realsense-ubuntu-lts.sh`<br />
-    * **Ubuntu with Kernel 4.16**
+   * **Ubuntu with Kernel 4.16**<br />
       `./scripts/patch-ubuntu-kernel-4.16.sh`<br />  
-    * **Intel® Joule™ with Ubuntu**
+   * **Intel® Joule™ with Ubuntu**<br />
       Based on the custom kernel provided by Canonical Ltd.  
 
       `./scripts/patch-realsense-ubuntu-xenial-joule.sh`<br />