Replace unprotected tilders by \~ -- an unprotected tilde is a
non-breaking space!
diff --git a/Doc/lib/libdis.tex b/Doc/lib/libdis.tex
index ac60fe3..55acab4 100644
--- a/Doc/lib/libdis.tex
+++ b/Doc/lib/libdis.tex
@@ -150,7 +150,7 @@
 \end{opcodedesc}
 
 \begin{opcodedesc}{UNARY_INVERT}{}
-Implements \code{TOS = ~TOS}.
+Implements \code{TOS = \~TOS}.
 \end{opcodedesc}
 
 Binary operations remove the top of the stack (TOS) and the second top-most