Unify print function usage for Python 2 and 3 via __future__ import

docs/md2man.py

@@ -1,3 +1,4 @@
+from __future__ import print_function
 import sys, os, markdown, re
 from BeautifulSoup import BeautifulSoup
 

redo/builder.py

@@ -1,4 +1,5 @@
 """Code for parallel-building a set of targets, if needed."""
+from __future__ import print_function
 import errno, os, stat, signal, sys, tempfile, time
 from . import cycles, env, helpers, jobserver, logs, paths, state
 from .logs import debug2, err, warn, meta

redo/cmd_log.py

@@ -1,4 +1,5 @@
 """redo-log: print past build logs. """
+from __future__ import print_function
 import errno, fcntl, os, re, struct, sys, time
 import termios
 from .atoi import atoi

redo/cmd_ood.py

@@ -1,4 +1,5 @@
 """redo-ood: list out-of-date (ood) targets."""
+from __future__ import print_function
 import sys, os
 from . import deps, env, logs, state
 

redo/cmd_redo.py

@@ -14,6 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from __future__ import print_function
 import sys, os, traceback
 from . import builder, env, helpers, jobserver, logs, options, state
 from .atoi import atoi

redo/cmd_sources.py

@@ -1,4 +1,5 @@
 """redo-sources: list the known source (not target) files."""
+from __future__ import print_function
 import sys, os
 from . import env, logs, state
 

redo/cmd_targets.py

@@ -1,4 +1,5 @@
 """redo-targets: list the known targets (not sources)."""
+from __future__ import print_function
 import sys, os
 from . import env, logs, state