user manual: Fix in installation

Author: m-kru

user-manual/hbs-user-manual.pdf

@@ -1,9 +1,9 @@
 = Installation
 
-There are four preferred installation methods.
+There are the following four preferred installation methods:
 
 + Copy the `hbs` file to your project.
-  This is preferred if you want to modify hbs default behavior.
+  This is preferred if you want to modify `hbs` default behavior.
   It is not advised to change the default behavior, but if you need, feel free to adjust the build system to your project needs.
 + Copy `hbs` file to one of the directories in the `$PATH` environment variable.
 + Clone the repository and add its path to the `$PATH` environment variable.