One more missing comma before

chapters/packages.tex

@@ -300,7 +300,7 @@ \section{External Resources}\label{external-resources}
 \filename{modelica://A/Resources/C.jpg} should be stored in the file \filename{A/Resources/C.jpg}, it is not recommend to use \filename{modelica://A.B/C.jpg} for referencing
 resources; it could be stored in the file \filename{A/B/C.jpg} -- which is counter-intuitive if \lstinline!A.B! is stored together with \lstinline!A!.  When Modelica packages
 are stored in other formats a similar mapping should be defined, such that a resource with a given path should be unique for any package name that precedes it.  The first
-part of the path shall not be the name of a class in the package given by the authority.  As above for \filename{Modelica 3.2.1/package.mo} i.e., resources starting from
+part of the path shall not be the name of a class in the package given by the authority.  As above for \filename{Modelica 3.2.1/package.mo}, i.e., resources starting from
 \filename{Modelica 3.2.1}, and \filename{modelica://Modelica.Mechanics/C.jpg} is \filename{Modelica 3.2.1/Mechanics/C.jpg} -- regardless of whether \lstinline!Modelica.Mechanics!
 is stored in \filename{Modelica 3.2.1/package.mo}, \filename{Modelica 3.2.1/Mechanics.mo}, or \filename{Modelica 3.2.1/Mechanics/package.mo}.