repos: Update summary formatting for recursive report

- distingush new packages ('+') from updated ('u');
- wider field for SRPM.

repos_cmp/repos.py

@@ -428,10 +428,21 @@ def recursive_build_report(from_repo, to_repo, *source_names,
         else:
             break
 
+    def letter(source):
+        if source in requested_source_names:
+            return ' '
+        to_source = to_repo.sources.get(source)
+        if not to_source:
+            return '+'  # new
+        from_source = from_repo.sources.get(source)
+        if not from_source:
+            return '?'
+        return 'u'
+
     reports.append('\n== SUMMARY ==\n')
     for source in order:
-        reports.append('{}\t{:50} {} :: {}'.format(
-            '' if source in requested_source_names else 'N',
+        reports.append('{}  {:60} {} :: {}'.format(
+            letter(source),
             from_repo.sources[source].source_rpm.decode(),
             b' '.join(build_source_deps[source]).decode(),
             b' '.join(pkg_source_deps[source]).decode()))