new option 'separator between indices'

Can be used to separate multiple affiliations by a single author
when no index is in use.

langsci-affiliations.dtx

@@ -21,7 +21,7 @@ package is probably of only limited use to document authors/end users.
 langsci-affiliations was developed at Language Science Press to help in the
 production of scientific texts in linguistics.
 
-Copyright (C) 2022 by Felix Kopecky, Language Science Press
+Copyright (C) 2023 by Felix Kopecky, Language Science Press
 
 This work consists of the file  langsci-affiliations.dtx 
           and the derived files langsci-affiliations.sty,
@@ -78,7 +78,7 @@ Please report any bugs or feature requests to
 % 		Please submit bug reports and feature requests to
 % 		\protect\url{https://github.com/langsci/langsci-affiliations/issues}.
 % 	}}
-% \date{Version 1.1 -- \today}
+% \date{Version 1.2 -- \today}
 % \maketitle
 % \frenchspacing
 % \begin{documentation}
@@ -111,39 +111,12 @@ Please report any bugs or feature requests to
 % \noindent The output can be customised using the \oarg{options}. They are described below.
 % \end{function}
 
-% \begin{function}[added=2021-12-06]{\CountAuthorsFromAffiliations}
-%   \begin{syntax}
-%     \cs{CountAuthorsFromAffiliations} \oarg{options} \marg{pairs of authors and affiliations}
-%   \end{syntax}
-% A document command to count the numbers of authors given in a list. Useful
-% for conditional behaviour of document classes based on the numbers of authors.
-% It takes the same optional arguments as \cmd{\ResolveAffiliations}. For example,
-% a custom author separator is recognised by this command.
-% 
-% The result is stored in the global integer variable \cs{g__affiliations_num_authors_int}.
-% \end{function}
-
-% \begin{function}[added=2022-09-27]{\LinkToORCIDinAffiliations}
-%   \begin{syntax}
-%     \cs{LinkToORCIDinAffiliations} \marg{orcid}
-%   \end{syntax}
-% This document command is intended as a user interface to customise the way
-% ORCIDs are output. For example, it can be set to forward the input ORCIDs to
-% \cs{orcidlink} from the \pkg{orcidlink} package:
-% 
-% \begin{verbatim}
-% \RenewDocumentCommand{\LinkToORCIDinAffiliations}{ +m }
-%   {%
-%     \,\orcidlink{#1}%
-%   }
-% \end{verbatim}
-% \end{function}
-
 % \begin{function}{\SetupAffiliations}
 %   \begin{syntax}
 %     \cs{SetupAffiliations} \marg{options}
 %   \end{syntax}
 % Options can be set either globally or locally. With \cs{SetupAffiliations}\marg{options}, they apply globally. If they are set with \cs{ResolveAffiliations}\oarg{options}, they apply locally.
+% \end{function}
 % 
 % \begin{description}[style=nextline]
 % \item[|mark style =| \meta{style}\hfill (initially |alphabetic|)] Controls which markers should be used in the indexes of affiliations. Can be a either of \{|alphabetic|, |numeric|, |circled|, |none|\}.
@@ -163,8 +136,10 @@ Please report any bugs or feature requests to
 % If there are more than two authors, use these \meta{tokens} to separate every pair except the last one.
 % \item[|separator between final two =| \meta{tokens}\hfill (initially |\char`~\&\char`~|)]
 % Use these \meta{tokens} to separate the last pair of authors if ther are more than two.
-% \item[|separator between affiliations =| \meta{tokens}\hfill (initially |,|)]
-% Use these to separate affiliations after each author. The affiliations in the affiliation line are always separated by a space.
+% \item[|separator between indices =| \meta{tokens}\hfill (initially |,|)]
+% Use these to separate affiliation indices after each author.
+% \item[|separator between affiliations =| \meta{tokens}\hfill (initially |\textvisiblespace |)]
+% Separates the affiliations in the affiliation line.
 % \end{description}
 % 
 % \noindent The way the input is digested can be customised with these two settings:
@@ -175,11 +150,36 @@ Please report any bugs or feature requests to
 % \item[|input affiliation separator =| \meta{tokens}\hfill (intially |;|)]
 % Separates the affiliations in the input, within dummy command \cs{affiliation}.
 % \end{description}
+%
+% \begin{function}[added=2021-12-06]{\CountAuthorsFromAffiliations}
+%   \begin{syntax}
+%     \cs{CountAuthorsFromAffiliations} \oarg{options} \marg{pairs of authors and affiliations}
+%   \end{syntax}
+% A document command to count the numbers of authors given in a list. Useful
+% for conditional behaviour of document classes based on the numbers of authors.
+% It takes the same optional arguments as \cmd{\ResolveAffiliations}. For example,
+% a custom author separator is recognised by this command.
 % 
+% The result is stored in the global integer variable \cs{g__affiliations_num_authors_int}.
+% \end{function}
+
+% \begin{function}[added=2022-09-27]{\LinkToORCIDinAffiliations}
+%   \begin{syntax}
+%     \cs{LinkToORCIDinAffiliations} \marg{orcid}
+%   \end{syntax}
+% This document command is intended as a user interface to customise the way
+% ORCIDs are output. For example, it can be set to forward the input ORCIDs to
+% \cs{orcidlink} from the \pkg{orcidlink} package:
+% 
+% \begin{verbatim}
+% \RenewDocumentCommand{\LinkToORCIDinAffiliations}{ +m }
+%   {%
+%     \,\orcidlink{#1}%
+%   }
+% \end{verbatim}
 % \end{function}
-% \end{documentation}
 % 
-% \newpage
+% \end{documentation}
 % 
 % \begin{implementation}
 % \section{Implementation}
@@ -192,7 +192,7 @@ Please report any bugs or feature requests to
 %    \begin{macrocode}
 \RequirePackage{xparse}
 \ProvidesExplPackage {langsci-affiliations}
-{2022-10-11} {1.1}
+{2023-10-12} {1.2}
 {A LaTeX3 package to collect and order authors and affiliations}
 %    \end{macrocode}
 
@@ -270,10 +270,14 @@ Please report any bugs or feature requests to
         = \l__affiliations_separator_between_last_two_tl,
     separator~between~final~two .initial:n
         = {~\&~},
+    separator~between~indices .tl_set:N
+        = \l__affiliations_indices_separator_tl,
+    separator~between~indices .initial:n
+        = {,},
     separator~between~affiliations .tl_set:N
         = \l__affiliations_afil_separator_tl,
     separator~between~affiliations .initial:n
-        = {,},
+        = {~},
     output~authors~font .cs_set:Np
         = \__affiliations_output_authors_font:,
     output~authors~font .initial:n
@@ -416,7 +420,12 @@ Please report any bugs or feature requests to
               }
             {none} { }
           }
-        \tl_rescan:nn {} {##1} ~
+        \tl_rescan:nn {} {##1} 
+        \int_compare:nNnT
+          { \int_eval:n {\l__affiliations_tmpa_int + 1} } 
+          < 
+          { \prop_count:N \l__affiliations_affiliations_prop } 
+          { \tl_use:N \l__affiliations_afil_separator_tl }
       }
   }
 %    \end{macrocode}
@@ -464,7 +473,7 @@ Please report any bugs or feature requests to
         \tl_set:Nn \l__affiliations_tmpb_tl 
           {
             \seq_use:Nn \l__affiliations_tmpb_seq 
-                        {\l__affiliations_afil_separator_tl}
+                        {\l__affiliations_indices_separator_tl}
           }
         \str_case_e:nn { \l__affiliations_orcid_place_tl }
           {