[basic.def.odr] Use "is", rather than "shall", when describing the behavior of

the implementation.

Fixes #168.

Author: zygoloid

source/basic.tex

@@ -473,7 +473,7 @@
 shall apply both to names from the template's enclosing scope used in the
 template definition~(\ref{temp.nondep}), and also to dependent names at
 the point of instantiation~(\ref{temp.dep}). If the definitions of
-\tcode{D} satisfy all these requirements, then the program shall behave
+\tcode{D} satisfy all these requirements, then the behavior is
 as if there were a single definition of \tcode{D}. If the definitions of
 \tcode{D} do not satisfy these requirements, then the behavior is
 undefined.%