Fix dubious \defnx that has see{} in it, and remove range index entry…

… with the same key.

source/iostreams.tex

@@ -11403,7 +11403,7 @@
 
 \pnum
 \indextext{path!normalization|(}%
-\defnx{Normalization}{normalization!path|see{path, normalization}} of a generic format pathname means:
+\defnx{Normalization}{normalization!path} of a generic format pathname means:
 
 \begin{enumerate}
 \item If the path is empty, stop.

source/templates.tex

@@ -1764,7 +1764,6 @@
 \end{example}
 
 \rSec2[temp.constr.normal]{Constraint normalization}
-\indextext{constraint!normalization|(}%
 
 \pnum
 The \defnx{normal form}{normal form!constraint} of an \grammarterm{expression} \tcode{E} is
@@ -1821,10 +1820,11 @@
 \end{itemize}
 
 \pnum
+\indextext{normalization|see{constraint, normalization}}%
 The process of obtaining the normal form of a
 \grammarterm{constraint-expression}
 is called
-\defnx{normalization}{normalization!constraint|see{constraint, normalization}}.
+\defnx{normalization}{constraint!normalization}.
 \begin{note}
 Normalization of \grammarterm{constraint-expression}{s}
 is performed
@@ -1854,7 +1854,6 @@
 The associated constraints of \#3 are
 \tcode{requires (T x) \{ ++x; \}} (with mapping $\tcode{T} \mapsto \tcode{U}$).
 \end{example}
-\indextext{constraint!normalization|)}
 
 \rSec2[temp.constr.order]{Partial ordering by constraints}
 \indextext{subsume|see{constraint, subsumption}}