charon: Rename variable containing the corrected/resolved prefix

auspiceDisplayUrl → resolvedPrefix because the value is a "prefix",
just like the one which got passed into parsePrefix(), not a full
URL, and it's a resolved version of the partial prefix passed in.

src/getDataset.js

@@ -137,15 +137,15 @@ const getDataset = async (req, res) => {
     return res.status(400).send(`Couldn't parse the url "${query.prefix}"`);
   }
 
-  const {source, dataset, auspiceDisplayUrl} = datasetInfo;
+  const {source, dataset, resolvedPrefix} = datasetInfo;
 
   // Authorization
   if (!source.visibleToUser(req.user)) {
     return helpers.unauthorized(req, res);
   }
 
   const baseUrl = req.url.split(query.prefix)[0];
-  let redirectUrl = baseUrl + '/' + auspiceDisplayUrl;
+  let redirectUrl = baseUrl + '/' + resolvedPrefix;
   if (query.type) {
     redirectUrl += `&type=${query.type}`;
   }

src/getDatasetHelpers.js

@@ -154,7 +154,7 @@ const correctPrefixFromAvailable = (sourceName, prefixParts) => {
 
 
 /* Parse the prefix (a path-like string specifying a source + dataset path)
- * with canonicalization.  Prefixes are case-sensitive.
+ * with resolving of partial prefixes.  Prefixes are case-sensitive.
  */
 const parsePrefix = (prefix) => {
   let {source, prefixParts} = splitPrefixIntoParts(prefix);
@@ -163,12 +163,13 @@ const parsePrefix = (prefix) => {
   // Source classes.
   prefixParts = correctPrefixFromAvailable(source.name, prefixParts);
 
-  // The URL to be displayed in Auspice
-  const auspiceDisplayUrl = joinPartsIntoPrefix({source, prefixParts});
+  // The resolved prefix, possibly "corrected" above, which we want to use for
+  // display.
+  const resolvedPrefix = joinPartsIntoPrefix({source, prefixParts});
 
   const dataset = source.dataset(prefixParts);
 
-  return ({auspiceDisplayUrl, source, dataset});
+  return ({source, dataset, resolvedPrefix});
 
 };