Fix issues with wildignore and tag stack

Closes https://github.com/davidhalter/jedi-vim/pull/483.
Fixes https://github.com/davidhalter/jedi-vim/issues/482.

test/goto.vim

@@ -177,4 +177,41 @@ describe 'goto_with_splits'
 end
 
 
+describe 'goto_wildignore'
+    before
+        set filetype=python
+        set wildignore=*,with\ spaces,*.pyc
+        set hidden
+        let g:jedi#use_tag_stack = 1
+        let g:jedi#use_tabs_not_buffers = 0
+        " Need to use splits for code coverage in new_buffer()
+        let g:jedi#use_splits_not_buffers = 1
+
+        put = ['from subprocess import Popen', 'Popen']
+        Expect CurrentBufferIsModule('subprocess') == 0
+        silent normal G
+    end
+
+    after
+        bd!
+        bd!
+        set wildignore&vim
+    end
+
+    it 'restores_wildignore'
+        let before = &wildignore
+        call jedi#goto()
+        Expect getline('.') =~ 'Popen'
+        Expect &wildignore == before
+    end
+
+    it 'not_using_tagstack'
+        let g:jedi#use_tag_stack = 0
+        call jedi#goto()
+        Expect CurrentBufferIsModule('subprocess') == 1
+        Expect getline('.') =~ 'Popen'
+    end
+end
+
+
 " vim: et:ts=4:sw=4