Move colon delimiting to generator

src/bin/saturnin.skel

       | LC_ALL=C sort
 }
 
-inigrep_paths() {
+inigrep_mkpath() {
     #
     # Assemble list of config paths for FFOO_INIGREP_PATH (path per line)
     #
     local user      # user's generic config
     local lcal      # local admin provided config
     local distd     # distribution-provided config (always modular)
+    local path      # one path item
     userd="__SATURNIN_CONFIG_USER__/ini.d"
     user="__SATURNIN_CONFIG_USER__"
     lcal="__SATURNIN_CONFIG_LOCAL__"
     distd="__SATURNIN_SHARE__/ini.d"
-    inigrep_modules "$userd"
-    echo "$user"
-    echo "$lcal"
-    inigrep_modules "$distd"
+    {
+        inigrep_modules "$userd"
+        echo "$user"
+        echo "$lcal"
+        inigrep_modules "$distd"
+    } \
+      | while read path;
+        do
+            test -z "$path" && continue
+            echo -n "$path:"
+        done
 }
 
 export FFOO_INIGREP_PATH FFOO_PATH FFOO_PRETTY_USAGE \
        SATURNIN_VERSION SATURNIN_CACHE_HOME
 
-FFOO_INIGREP_PATH="$(inigrep_paths | tr '\n' :)"
+FFOO_INIGREP_PATH="$(inigrep_mkpath)"
 FFOO_PATH="__SATURNIN_FFOO_DIR__"
 FFOO_PRETTY_USAGE="subcommand"
 SATURNIN_CACHE_HOME="__SATURNIN_CACHE_HOME__"