replacing `\begin{frame}{...}` with the more robust and flexible syntax `\begin{frame}\frametitle{...}` (#36)

examples/demo/demo.tex

@@ -28,13 +28,15 @@
 
 \maketitle
 
-\begin{frame}{Table of Contents}
+\begin{frame}
+\frametitle{Table of Contents}
   \tableofcontents[hideallsubsections]
 \end{frame}
 
 \section{Introduction}
 
-\begin{frame}[fragile]{Moloch}
+\begin{frame}[fragile]
+\frametitle{Moloch}
 
   The \themename theme is a Beamer theme with minimal visual noise. It is a fork of the
   \href{https://github.com/matze/mtheme}{metropolis theme} by Matthias Vogelgesang, which in
@@ -45,7 +47,8 @@
   \begin{verbatim}\documentclass{beamer}
 \usetheme{moloch}\end{verbatim}
 \end{frame}
-\begin{frame}[fragile]{Sections}
+\begin{frame}[fragile]
+\frametitle{Sections}
   Sections group slides of the same topic by introducing a section page between them. A progress bar is shown which indicates how far along in the presentation you are.
 
   \begin{verbatim}\section{Title Formats}\end{verbatim}
@@ -53,7 +56,8 @@
 
 \section{Title Formats}
 
-\begin{frame}[fragile]{Moloch Title Formats}
+\begin{frame}[fragile]
+\frametitle{Moloch Title Formats}
   \themename supports four different title formats:
   \begin{itemize}
     \item \texttt{regular} (Regular)
@@ -69,7 +73,8 @@
 
 {
 \molochset{titleformat frame=smallcaps}
-\begin{frame}{Small Caps}
+\begin{frame}
+\frametitle{Small Caps}
   This frame uses the \texttt{smallcaps} title format.
 
   \begin{alertblock}{Potential Problems}
@@ -80,7 +85,8 @@
 
 {
 \molochset{titleformat frame=allsmallcaps}
-\begin{frame}{All Small Caps}
+\begin{frame}
+\frametitle{All Small Caps}
   This frame uses the \texttt{allsmallcaps} title format.
 
   \begin{alertblock}{Potential Problems}
@@ -103,7 +109,8 @@
 
 {
 \molochset{titleformat frame=allcaps}
-\begin{frame}{All Caps}
+\begin{frame}
+\frametitle{All Caps}
   This frame uses the \texttt{allcaps} title format.
 
   \begin{alertblock}{Potential Problems}
@@ -114,7 +121,8 @@
 
 \section{Elements}
 
-\begin{frame}[fragile]{Typography}
+\begin{frame}[fragile]
+\frametitle{Typography}
   \begin{verbatim}The theme provides sensible defaults to
 \emph{emphasize} text, \alert{accent} parts or show
 \textbf{bold} results.\end{verbatim}
@@ -125,7 +133,8 @@
   \alert{accent} parts or show \textbf{bold} results.
 \end{frame}
 
-\begin{frame}{Font Features Test}
+\begin{frame}
+\frametitle{Font Features Test}
   \begin{itemize}
     \item Regular
     \item \textit{Italic}
@@ -140,7 +149,8 @@
   \end{itemize}
 \end{frame}
 
-\begin{frame}{Lists}
+\begin{frame}
+\frametitle{Lists}
   \begin{columns}[T,onlytextwidth]
     \column{0.3\textwidth}
     Items
@@ -161,14 +171,16 @@
     \end{description}
   \end{columns}
 \end{frame}
-\begin{frame}{Animation}
+\begin{frame}
+\frametitle{Animation}
   \begin{itemize}[<+- | alert@+>]
     \item \alert<4>{This is\only<4>{ really} important}
     \item Now this
     \item And now this
   \end{itemize}
 \end{frame}
-\begin{frame}{Figures}
+\begin{frame}
+\frametitle{Figures}
   \begin{figure}
     \newcounter{density}
     \setcounter{density}{20}
@@ -195,7 +207,8 @@
   \end{figure}
 \end{frame}
 
-\begin{frame}{Tables}
+\begin{frame}
+\frametitle{Tables}
   \framesubtitle{Largest cities in the world}
   \begin{table}
     \caption{Largest cities in the world (source: Wikipedia)}
@@ -211,7 +224,8 @@
     \end{tabular}
   \end{table}
 \end{frame}
-\begin{frame}[fragile]{Blocks}
+\begin{frame}[fragile]
+\frametitle{Blocks}
   Three different block environments are pre-defined: \verb|block|, \verb|alertblock|,
   and \verb|exampleblock|. They can be styled using the option
   \verb|block|, which takes values \verb|transparent| (default, left column) and \verb|fill| (right column).
@@ -250,13 +264,15 @@
   \end{columns}
 \end{frame}
 
-\begin{frame}{Math}
+\begin{frame}
+\frametitle{Math}
   \begin{equation*}
     e = \lim_{n\to \infty} \left(1 + \frac{1}{n}\right)^n
   \end{equation*}
 \end{frame}
 
-\begin{frame}{Quotes}
+\begin{frame}
+\frametitle{Quotes}
   \begin{quote}
     Verily, I say unto you, the days spoken of in the Apocalypse are nigh!
   \end{quote}
@@ -264,19 +280,22 @@
 
 {%
 \setbeamertemplate{frame footer}{My custom footer}
-\begin{frame}[fragile]{Frame Footer}
+\begin{frame}[fragile]
+\frametitle{Frame Footer}
   \themename defines a custom beamer template to add a text to the footer. It can be set via
   \begin{verbatim}\setbeamertemplate{frame footer}{My custom footer}\end{verbatim}
 \end{frame}
 }
 
-\begin{frame}[fragile]{References}
+\begin{frame}[fragile]
+\frametitle{References}
   Here are some references~\cite{Knuth92,ConcreteMath,Simpson,Er01,greenwade93} to showcase \verb+[allowframebreaks]+.
 \end{frame}
 
 \section{Conclusion}
 
-\begin{frame}{Summary}
+\begin{frame}
+\frametitle{Summary}
 
   Get the source of this theme and the demo presentation from
   \begin{center}