refactor(test: awesomerc: hotkeys): imitate fake vim client instead of depending on vim as test dep

.travis.yml

@@ -43,7 +43,6 @@ addons:
       - xvfb
       - zsh
       - x11-apps
-      - vim-nox
       # Need xorg-macros
       - xutils-dev
       # lgi.

docs/01-readme.md

@@ -109,7 +109,6 @@ Additionally, the following optional dependencies exist:
 - [wmctrl](http://tripie.sweb.cz/utils/wmctrl) for testing WM interactions
   with external actions
 - [xterm](https://invisible-island.net/xterm/) for various test cases
-- [vim](https://www.vim.org/) for testing app-specific hotkeys help widget
 
 ## Running Awesome
 

tests/test-awesomerc.lua

@@ -268,9 +268,10 @@ local steps = {
         elseif count == 3 then
             assert(not hotkeys_wibox.visible)
             root.fake_input("key_release", "Super_L")
-            -- now let's run vim so hotkeys widget will show hotkeys for it:
             test_context.hotkeys01_clients_before = #client.get()
-            awful.spawn("xterm -e vim")
+            -- imitate fake client with name "vim"
+            -- so hotkeys widget will offer vim hotkeys:
+            awful.spawn("xterm -title vim cat")
 
         elseif not test_context.hotkeys01_count_vim then
             -- if xterm with vim got already opened: