Bug fix and improvements for AppVeyor introspection :-)

scripts/appveyor.py

@@ -16,7 +16,16 @@
 from executor import get_search_path, which
 
 print("FakeS3 executables:\n%r" % which('fakes3'))
+
+for program in which('fakes3'):
+    with open(program) as handle:
+        contents = handle.read()
+        delimiter = "-" * 40
+        vertical_whitespace = "\n\n"
+        padding = vertical_whitespace + delimiter + vertical_whitespace
+        print(padding + ("%s:" % program) + padding + contents + padding)
+
 print("Executable search path:\n\n%s" % "\n\n".join(
     "%s:\n%s" % (d, concatenate(sorted(os.listdir(d))))
-    for d in get_search_path()
+    for d in get_search_path() if os.path.isdir(d)
 ))