[std, styles] Adjust table captions as per ISO request

ISO has asked for captions to be bold and table numbers to be
separated by a dash.

Author: tkoeppe

source/std.tex

@@ -13,6 +13,7 @@
            {listings}     % code listings
 \usepackage{longtable}    % auto-breaking tables
 \usepackage{ltcaption}    % fix captions for long tables
+\usepackage{caption}      % caption style
 \usepackage{relsize}      % provide relative font size changes
 \usepackage{textcomp}     % provide \text{l,r}angle
 \usepackage{underscore}   % remove special status of '_' in ordinary text

source/styles.tex

@@ -113,6 +113,8 @@
 %%--------------------------------------------------
 %%  set caption style
 \captionstyle{\centering}
+\DeclareCaptionLabelSeparator{emdash}{ --- }
+\captionsetup{labelsep=emdash,font+=bf}
 
 %%--------------------------------------------------
 %% set global styles that get reset by \mainmatter