Apply suggestions from code review

Co-authored-by: Johel Ernesto Guerrero Peña <[email protected]>

Author: jensmaurer

source/time.tex

@@ -2703,7 +2703,7 @@
 \effects
 Equivalent to:
 \begin{codeblock}
-return os << format(os.getloc(), STATICALLY-WIDEN("{:L%F %T}"), tp);
+return os << format(os.getloc(), @\placeholder{STATICALLY-WIDEN}@("{:L%F %T}"), tp);
 \end{codeblock}
 
 \pnum
@@ -6258,7 +6258,7 @@
 \effects
 Equivalent to:
 \begin{codeblock}
-return os << format(os.getloc(), @\placeholder{STATICALLY-WIDEN}@<charT>("{:L}/{:L}"),
+return os << format(os.getloc(), @\placeholder{STATICALLY-WIDEN}@<charT>("{}/{:L}"),
                     ym.year(), ym.month());
 \end{codeblock}
 \end{itemdescr}
@@ -10086,7 +10086,7 @@
 \effects
 Equivalent to:
 \begin{codeblock}
-return os << format(os.getloc(), STATICALLY-WIDEN("{:L%F %T %Z}"), t);
+return os << format(os.getloc(), @\placeholder{STATICALLY-WIDEN}@("{:L%F %T %Z}"), t);
 \end{codeblock}
 \end{itemdescr}
 
@@ -10481,7 +10481,7 @@
 \begin{itemize}
 \item
 the "C" locale if the \tcode{L} option
-is not present in \grammarterm{chrono-format-spec}, otherwise
+is not present in \fmtgrammarterm{chrono-format-spec}, otherwise
 \item
 the locale passed to the formatting function if any, otherwise
 \item