Improve reference to figure 3.2 in text.

Author: ramink

book/sourdough-starter/sourdough-starter.tex

@@ -139,8 +139,10 @@ \section{The process of making a starter}
 I~like to use a glass and place another
 inverted one on top.
 
-Now an epic battle~\ref{fig:sourdough-starter-microbial-war} begins. In one study~\cite{yeasts+biocontrol+agent}
-scientists have identified more than \num{150}~different yeast species living
+Now an epic battle begins, as visualized in 
+figure~\ref{fig:sourdough-starter-microbial-war}. In one 
+study~\cite{yeasts+biocontrol+agent} scientists have identified
+more than \num{150}~different yeast species living
 on a single leaf of a plant.
 All of the different yeasts and bacteria are trying to get
 the upper hand in this battle. Other pathogens such as mold