Pre-declare and explain local variables

src/ffoo/saturnin_www.sh

@@ -136,12 +136,14 @@ kw2uri() {
     #
     # Turn keyword or query (like "g hello" for google) to URI
     #
-    local line
+    local line      # input line,   eg. "g hello dolly" or "bug 1234"
+    local kw        # keyword part, eg. "g"             or "bug"
+    local query     # query part,   eg. "hello dolly"   or "1234"
     while read line;
     do
         line="$line "
-        local kw=${line%% *}
-        local query=${line#$kw }
+        kw=${line%% *}
+        query=${line#$kw }
         debug -v kw query
         if test -n "$query";
         then