Supply encoding parameter, suppressing EncodingWarnings.

CHANGES.rst

@@ -1,3 +1,8 @@
+v2.4.0
+======
+
+Supply the encoding, fixing EncodingWarnings.
+
 v2.3.1
 ======
 

rst/linker.py

@@ -121,9 +121,11 @@ def _get_scm_info_for(scm_version):
         )
         cmd = commands[scm]
         try:
-            with open(os.devnull, 'w') as devnull:
-                out = subprocess.check_output(cmd, stderr=devnull)
-                ts = out.decode('utf-8').strip()
+            with open(os.devnull, 'w', encoding='utf-8') as devnull:
+                out = subprocess.check_output(
+                    cmd, stderr=devnull, text=True, encoding='utf-8'
+                )
+                ts = out.strip()
             return dict(timestamp=dateutil.parser.parse(ts))
         except Exception:
             pass

test_all.py

@@ -52,10 +52,11 @@ def test_write_links(linker_defn):
         ---
 
         proj 1.0 was released
-        """
+        """,
+        encoding='utf-8',
     )
     repl.write_links(source, dest)
-    res = dest.read_text()
+    res = dest.read_text(encoding='utf-8')
     assert 'kilnhg' in res
     source.remove()
     dest.remove()