multiarchanalyze: give examples when representing arch sets

Uwe Kleine-König said that knowing example architectures for file
conflicts would be incredibly useful. The old presentation of
architecture sets would collapse sets that are too big to a single
count. This makes it difficult to find any colliding pair. Now, we'll
now give at least two example architectures in addition to the count.

Reported-By: Uwe Kleine-König <ukleinek@debian.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/multiarchanalyze.py b/multiarchanalyze.py
index d1947a2..b12fc79 100755
--- a/multiarchanalyze.py
+++ b/multiarchanalyze.py
@@ -42,10 +42,12 @@ def show_archset(archs, limit=3):
     @type archs: set(str)
     @rtype: str
     """
-    archs = set(archs)
-    if len(archs) > limit:
-        return "%d archs" % len(archs)
-    return ", ".join(sorted(archs))
+    archs = sorted(set(archs))
+    if len(archs) <= limit:
+        return ", ".join(archs)
+    assert limit > 2
+    limit = limit - 1
+    return "%s, and %d more" % (", ".join(archs[:limit]), len(archs) - limit)
 
 def show_combinations(combinations):
     edges = {}