Discourage \renewcommand for context-sensitive delims

doc/latex/biblatex/biblatex.tex

@@ -5012,7 +5012,7 @@ \subsection{Formatting Commands}
 \subsubsection{Generic Commands and Hooks}
 \label{use:fmt:fmt}
 
-The commands in this section may be redefined with \cmd{renewcommand} in the document preamble. Those marked as <Context Sensitive> in the margin can also be customised with \cmd{DeclareDelimFormat} and are printed with \cmd{printdelim} (\secref{use:fmt:csd}). Note that all commands starting with \cmd{mk\dots} take one argument. All of these commands are defined in \path{biblatex.def}.
+The commands in this section may be redefined with \cmd{renewcommand} in the document preamble. Those marked as <Context Sensitive> in the margin can also (and genereally should) be customised with \cmd{DeclareDelimFormat} and are printed with \cmd{printdelim} (\secref{use:fmt:csd}). Note that all commands starting with \cmd{mk\dots} take one argument. All of these commands are defined in \path{biblatex.def}.
 
 \begin{ltxsyntax}