--- ctxbeta/tex/texmf-context/doc/context/sources/general/manuals/math/math-suboptimal.tex	2018-01-19 13:51:28.000000000 +0100
+++ math-suboptimal.tex	2018-01-19 20:45:39.742994480 +0100
@@ -15,6 +15,7 @@
 However, the quality of the coverage can differ per font. Here we show how Latin
 Modern, Pagella, Cambria, Lucida and Dejavu look like:
 
+\start
 \showglyphs
 
 \starttexdefinition ShowSample #1#2
@@ -30,6 +31,7 @@
 \ShowSample{cambria} {Cambria}      \blank
 \ShowSample{lucidaot}{Lucida}       \blank
 \ShowSample{dejavu}  {Dejavu}
+\stop
 
 Of course fonts can be improved (or patched) and these samples might come out
 better compared to previous renderings.