cli: fix changelog encode for PY3

relates [issue#577](https://pagure.io/koji/issue/577)

koji/__init__.py

@@ -2966,6 +2966,16 @@ def removeNonprintable(value):
     # expects raw-encoded string, not unicode
     return value.translate(None, NONPRINTABLE_CHARS)
 
+def fixPrint(value):
+    if not value:
+        return str('')
+    elif six.PY2 and isinstance(value, six.text_type):
+        return value.encode('utf8')
+    elif six.PY3 and isinstance(value, six.binary_type):
+        return value.decode('utf8')
+    else:
+        return value
+
 def fixEncoding(value, fallback='iso8859-15', remove_nonprintable=False):
     """
     Convert value to a 'str' object encoded as UTF-8.
@@ -2976,8 +2986,8 @@ def fixEncoding(value, fallback='iso8859-15', remove_nonprintable=False):
         return six.b('')
 
     if isinstance(value, six.text_type):
-        # value is already unicode, so just convert it
-        # to a utf8-encoded str
+        # value is already unicode(py3: str), so just convert it
+        # to a utf8-encoded str(py3: bytes)
         s = value.encode('utf8')
     else:
         # value is a str, but may be encoded in utf8 or some

koji/util.py

@@ -48,9 +48,11 @@ try:
 except ImportError:  # pragma: no cover
     from sha import new as sha1_constructor
 
+
 def _changelogDate(cldate):
     return time.strftime('%a %b %d %Y', time.strptime(koji.formatTime(cldate), '%Y-%m-%d %H:%M:%S'))
 
+
 def formatChangelog(entries):
     """Format a list of changelog entries (dicts)
     into a string representation."""
@@ -59,9 +61,9 @@ def formatChangelog(entries):
         result += """* %s %s
 %s
 
-""" % (_changelogDate(entry['date']), entry['author'].encode("utf-8"),
-       entry['text'].encode("utf-8"))
-
+""" % (_changelogDate(entry['date']),
+       koji.fixPrint(entry['author']),
+       koji.fixPrint(entry['text']))
     return result
 
 DATE_RE = re.compile(r'(\d+)-(\d+)-(\d+)')