Make calls to logs.setup() explicit in each cmd.

Further reducing magic implicit behaviour to make code easier to
follow.

redo/cmd_sources.py

@@ -1,14 +1,15 @@
 import sys, os
-from . import state, env
-from .logs import err
+from . import env, logs, state
 
 
 def main():
-    state.init([])
     if len(sys.argv[1:]) != 0:
-        err('%s: no arguments expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: no arguments expected.\n' % sys.argv[0])
         sys.exit(1)
 
+    state.init([])
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
     cwd = os.getcwd()
     for f in state.files():
         if f.is_source():