[exec.schedule.from], [simd.ctor] Remove incorrect @ escapes

Author: mattkretz

source/exec.tex

@@ -3025,7 +3025,7 @@
 \pnum
 Let \tcode{Sigs} be
 a pack of the arguments to the \tcode{completion_signatures} specialization
-named by \tcode{completion_signatures_of_t<@\exposid{child-type}<Sndr>, env_of_t<Rcvr>>}.
+named by \tcode{completion_signatures_of_t<\exposid{child-type}<Sndr>, env_of_t<Rcvr>>}.
 Let \exposid{as-tuple} be an alias template
 that transforms a completion signature \tcode{Tag(Args...)} into
 the tuple specialization \tcode{\exposid{decayed-tuple}<Tag, Args...>}.

source/numerics.tex

@@ -17431,8 +17431,8 @@
 \pnum
 \constraints
 \begin{itemize}
-\item \tcode{R} models \tcode{ranges::@\libconcept{contiguous_range}@} and
-  \tcode{ranges::@\libconcept{sized_range}@},
+\item \tcode{R} models \tcode{ranges::\libconcept{contiguous_range}} and
+  \tcode{ranges::\libconcept{sized_range}},
 \item \tcode{ranges::size(r)} is a constant expression, and
 \item \tcode{ranges::size(r)} is equal to \tcode{size()}.
 \end{itemize}
@@ -17478,8 +17478,8 @@
 \pnum
 \constraints
 \begin{itemize}
-\item \tcode{R} models \tcode{ranges::@\libconcept{contiguous_range}@} and
-  \tcode{ranges::@\libconcept{sized_range}@}, and
+\item \tcode{R} models \tcode{ranges::\libconcept{contiguous_range}} and
+  \tcode{ranges::\libconcept{sized_range}}, and
 \item \tcode{ranges::size(r)} is a constant expression.
 \end{itemize}