Rename redo/python -> redo/py.

This avoids a name overlap with the system-installed copy of python.
Since redo adds the redo/ dir to the $PATH before running .do files,
python.do might see its own previously-created target instead of the
"real" python when testing, and create an infinite loop by accident.

bin/all.do

@@ -1,3 +1,3 @@
 exec >&2
-redo-ifchange ../redo/version/all ../redo/python list redo-sh
+redo-ifchange ../redo/version/all ../redo/py list redo-sh
 xargs redo-ifchange <list

docs/md-to-man.do

@@ -1,7 +1,6 @@
-redo-ifchange md2man.py ../redo/whichpython
-read py <../redo/whichpython
-if ../redo/python ./md2man.py /dev/null /dev/null >/dev/null; then
-	echo '../redo/python ./md2man.py $2.md.tmp $2.html'
+redo-ifchange md2man.py ../redo/py
+if ../redo/py ./md2man.py /dev/null /dev/null >/dev/null; then
+	echo '../redo/py ./md2man.py $2.md.tmp $2.html'
 else
 	echo "Warning: md2man.py missing modules; can't generate manpages." >&2
 	echo "Warning: try this: sudo easy_install markdown BeautifulSoup" >&2

redo/.gitignore

@@ -1,4 +1,4 @@
 *.pyc
 sh
 whichpython
-python
+py

redo/clean.do

@@ -1,2 +1,2 @@
 redo version/clean
-rm -f whichpython python *.pyc */*.pyc
+rm -f whichpython python py *.pyc */*.pyc

t/101-atime/atime2.do

@@ -1,6 +1,6 @@
 # make sure redo doesn't think merely *reading* the old file counts as
 # modifying it in-place.
 cat $1 >/dev/null 2>/dev/null || true
-../../redo/python tick.py
+../../redo/py tick.py
 cat $1 >/dev/null 2>/dev/null || true
 echo hello

t/130-mode/all.do

@@ -1,5 +1,5 @@
 umask 0022
 redo mode1
-MODE=$(../../redo/python -c \
+MODE=$(../../redo/py -c \
 	'import os; print oct(os.stat("mode1").st_mode & 07777)')
 [ "$MODE" = "0644" ] || exit 78