fixup! Provide an image with default Vims (including Neovim)

Author: blueyed

Dockerfile.default

@@ -1,20 +1,16 @@
-# A set of default Vims, including Neovim.
+# A set of default Vims, including the latest Neovim release.
+#
+# This is available online at https://hub.docker.com/r/testbed/vim-default/.
 FROM testbed/vim
 
 # Currently tested versions:
 #  - v7.3.429 (Ubuntu Precise, 12.04LTS; same as on Travis currently)
 #  - v7.4.052 (Ubuntu Trusty, 14.04LTS)
 #  - v7.4.1689 (Ubuntu Xenial, 16.04LTS)
-#  - v8.0.8069 (Updated Vim 8, https://groups.google.com/forum/#!topic/vim_dev/ro_FpeXgc24)
+#  - v8.0.8586 (Stable release according to Windows download at
+#               http://www.vim.org/download.php)
 RUN install_vim -tag v7.3.429 -name vim73 -py -build \
                 -tag v7.4.052 -name vim74-trusty -build \
                 -tag v7.4.1689 -name vim74-xenial -build \
-                -tag v8.0.0069 -name vim8069 -build \
-                -tag neovim:v0.1.7 -py2 -py3 -build \
-                -tag neovim:v0.2.0 -py2 -py3 -build
-
-ENV _UPDATE=2017-05-02
-
-# Git master in a separate layer, since the above is meant to be stable.
-RUN install_vim -tag master -py3 -build \
-                -tag neovim:master -py2 -py3 -build
+                -tag v8.0.0586 -name vim -py2 -py3 -build \
+                -tag neovim:v0.2.0 -name nvim -py2 -py3 -build