Restore paragraph break between text and 'tabular' environment

Addressing review comment by Hans.

chapters/introduction.tex

@@ -95,6 +95,7 @@ \section{Some Definitions}\doublelabel{some-definitions}
 grammar. Non-normative text, i.e., examples and comments, are enclosed
 in {[}\ldots{]} and set in italics. Additional terms are explained
 in the glossary in \autoref{glossary}. Some important terms are:
+\par% The 'tabular' environment doesn't take care of breaking the current line.
 \begin{tabular}{|l|p{10cm}|}
 \hline
 \tablehead{Term} & \tablehead{Definition} \\