Update docs for running doctests locally

travis/docker/Makefile

@@ -1,13 +1,14 @@
 ROOT = $(shell git rev-parse --show-toplevel)
 $(shell reset)
 
+all: doctest3
+
 Dockerfile: FORCE
 	cp $(ROOT)/extra/docker/develop/Dockerfile Dockerfile
 	cat Dockerfile.travis >> Dockerfile
 	cp $(ROOT)/extra/docker/develop/10-import.py 10-import.py
 	cp $(ROOT)/extra/docker/develop/ipython_config.py ipython_config.py
 
-all: doctest3
 
 shell bash: image
 	@echo Running interactive shell
@@ -30,4 +31,4 @@ image: Dockerfile
 	docker build -t travis .
 
 FORCE:
-.PHONY: all image doctest bash
+.PHONY: all image doctest2 doctest3 bash

travis/docker/README.md

@@ -6,7 +6,19 @@ It's pretty simple, just run `make`.  All of your changes will be copied into th
 
 ```shell
 $ make -C travis/docker ANDROID=yes
-$ make -C travis/docker ANDROID=no TARGET=docs/source/tubes/ssh.rst
+$ make -C travis/docker ANDROID=no TARGET=ssh.rst
+```
+
+By default the Python 3 tests are run. You can choose the Python version using the `doctest2` or `doctest3` target.
+
+```shell
+$ make -C travis/docker ANDROID=no doctest2
+```
+
+You can get drop into a tmux session in the container to debug tests using the `shell` or `bash` targets.
+
+```shell
+$ make -C travis/docker shell
 ```
 
 ## Options
@@ -19,7 +31,7 @@ Controls whether or not to run the Android test.  The valid options are ``yes``
 
 ### `TARGET`
 
-This is appended to the `sphinx` command line, but generally is useful to sepcify a specific `rst` file to parse (e.g. to only run those tests).
+This is appended to the `sphinx` command line, but generally is useful to select a specific `rst` file to parse (e.g. to only run those tests).
 
 ## Known Issues
 

travis/docker/tmux.sh

@@ -1,2 +1,2 @@
 #!/usr/bin/env zsh
-exec tmux -u -2 -CC
+exec tmux -u -2