Clarify nametitledelim (and friends) docs

doc/latex/biblatex/biblatex.tex

@@ -12624,16 +12624,16 @@ \subsubsection{User-definable Commands and Hooks}
 Similar to \cmd{multicitedelim}, but intended for \cmd{textcite} and related commands (\secref{use:cit:cbx}). The default is a comma plus an interword space. The standard styles modify this provisional definition to ensure that the delimiter before the final citation is the localised term <and>, separated by interword spaces.
 
 \csitem{nametitledelim}\CSdelimMark
-The delimiter to be printed between the author\slash editor and the title. This command should be incorporated in the definition of all citation commands of author-title and some verbose citation styles and in the bibliography drivers---in author-year bibliographies \cs{nametitledelim} may be printed between the author\slash editor-year block and the title. The default definition inside bibliographies is the now deprecated \cmd{labelnamepunct} (for backwrds compatibility reasons) and is a comma plus an interword space otherwise.
+The delimiter to be printed between the author\slash editor and the title. This command should be incorporated in the definition of all citation commands of author-title and some verbose citation styles and in the bibliography drivers---in author-year bibliographies \cs{nametitledelim} may be printed between the author\slash editor-year block and the title. The default definition inside bibliographies (\ie in the \texttt{bib} and \texttt{biblist} contexts) is the now deprecated \cmd{labelnamepunct} (for backwards compatibility reasons), in \texttt{textcite} context it is a space and it is a comma plus an interword space otherwise.
 
 \csitem{nameyeardelim}\CSdelimMark
-The delimiter to be printed between the author\slash editor and the year. This command should be incorporated in the definition of all citation commands of author-year citation styles and in the bibliography drivers. The default definition is an interword space.
+The delimiter to be printed between the author\slash editor and the year. This command should be incorporated in the definition of all citation commands of author-year citation styles and in the bibliography drivers. The default definition is an interword space. For backwards compatibility reasons there are separate definitions in the \texttt{bib}, \texttt{biblist}, \texttt{textcite} and global context.
 
 \csitem{namelabeldelim}\CSdelimMark
 The delimiter printed between the name\slash title and the label. This command should be incorporated in the definition of all citation commands of alphabetic and numeric citation styles. The default definition is an interword space.
 
 \csitem{nonameyeardelim}\CSdelimMark
-The delimiter printed between the substitute for the labelname when it does not exist (usually the label or title in standard styles) and the year citation styles and the bibliography drivers. This command should be incorporated in the definition of all citation commands of author-year citation styles and in the bibliography drivers. The default definition is an interword space.
+The delimiter printed between the substitute for the labelname when it does not exist (usually the label or title in standard styles) and the year citation styles and the bibliography drivers. This command should be incorporated in the definition of all citation commands of author-year citation styles and in the bibliography drivers. The default definition is an interword space. For backwards compatibility reasons there are separate definitions in the \texttt{bib}, \texttt{biblist}, \texttt{textcite} and global context.
 
 \csitem{authortypedelim}\CSdelimMark
 The delimiter printed between the author and the \texttt{authortype}. The default is a comma followed by a space.