doc/structures.tex: Put two spaces between sentences.

diff --git a/doc/structures.tex b/doc/structures.tex
index 1014cbd..6532dbd 100644 (file)
--- a/doc/structures.tex
+++ b/doc/structures.tex
@@ -489,9 +489,9 @@ first.
 
 This is mostly an irrelevant detail, whose purpose is to defend against
 malicious compilers: pointers are always to one of the inner @|vt|
-structures. It's important only because it's the outer @|vtu| union which is
-exported by name. Specifically, for each chain of $C$'s superclasses there is
-an external object
+structures.  It's important only because it's the outer @|vtu| union which is
+exported by name.  Specifically, for each chain of $C$'s superclasses there
+is an external object
 \begin{prog}
   const union $A$__vtu_$i$ $C$__vtable_$i$;
 \end{prog}