Fixed https://github.com/amix/vimrc/issues/546

This is done by removing custom FileType indent options, and using
`vim-python-pep8-indent` plugin.

sources_non_forked/vim-python-pep8-indent/spec/indent/cython_spec.rb

@@ -0,0 +1,36 @@
+require "spec_helper"
+
+describe "vim for cython" do
+  before(:all) {
+    vim.command "new"
+    vim.command "set ft=cython"
+    vim.command("set indentexpr?").should include "GetPythonPEPIndent("
+  }
+  before(:each) {
+    # clear buffer
+    vim.normal 'gg"_dG'
+
+    # Insert two blank lines.
+    # The first line is a corner case in this plugin that would shadow the
+    # correct behaviour of other tests. Thus we explicitly jump to the first
+    # line when we require so.
+    vim.feedkeys 'i\<CR>\<CR>\<ESC>'
+  }
+  after(:all) {
+    vim.command "bwipe!"
+  }
+
+  describe "when using a cdef function definition" do
+      it "indents shiftwidth spaces" do
+          vim.feedkeys 'icdef long_function_name(\<CR>arg'
+          indent.should == shiftwidth
+      end
+  end
+
+  describe "when using a cpdef function definition" do
+      it "indents shiftwidth spaces" do
+          vim.feedkeys 'icpdef long_function_name(\<CR>arg'
+          indent.should == shiftwidth
+      end
+  end
+end