doc/sod.sty: Add `lit' TikZ style for literal text.

diff --git a/doc/sod.sty b/doc/sod.sty
index 6a2c1c3..4daadb2 100644 (file)
--- a/doc/sod.sty
+++ b/doc/sod.sty
@@ -61,7 +61,10 @@
 \def\fixme#1{\leavevmode\marginpar{FIXME}[FIXME: #1]}
 
 %% Diagram settings.
-\tikzset{every picture/.style={>=stealth, thick}}
+\tikzset{
+  every picture/.style={>=stealth, thick},
+  lit/.style={font=\sffamily}
+}
 
 %% Metavariables are italics without decoration.
 \def\syntleft{\normalfont\itshape}