#904 Do not run linters on :wq or :x

test/test_quitting_variable.vader

@@ -0,0 +1,22 @@
+Before:
+  Save g:ale_enabled
+
+  unlet! b:ale_quitting
+  let g:ale_enabled = 0
+
+After:
+  Restore
+
+  unlet! b:ale_quitting
+
+Execute(QuitEvent should set b:ale_quitting to 1):
+  call ale#events#QuitEvent(bufnr(''))
+
+  AssertEqual 1, b:ale_quitting
+
+Execute(EnterEvent should set b:ale_quitting to 0):
+  let b:ale_quitting = 1
+
+  call ale#events#EnterEvent(bufnr(''))
+
+  AssertEqual 0, b:ale_quitting