Fix unordered list to render properly

An unordered list without a leading blank line renders only as an inline
text. Adding a new blank line is enough to make it render properly as an
unordered list, as intended.

Author: Petr Kajzar

book/03-git-branching/sections/branch-management.asc

@@ -168,6 +168,7 @@ But the remote still has a _master_ branch.
 Other collaborators will continue to use the _master_ branch as the base of their work, until you make some further changes.
 
 Now you have a few more tasks in front of you to complete the transition:
+
 * Any projects that depend on this one will need to update their code and/or configuration.
 * Update any test-runner configuration files.
 * Adjust build and release scripts.