tests: check correct @function.inner when at end of function

Author: Dook97

tests/select/lua/selection_mode.lua

@@ -0,0 +1,7 @@
+function a()
+  print('foo')
+end
+
+function b()
+  print('bar')
+end

tests/select/lua_spec.lua

@@ -0,0 +1,12 @@
+local Runner = require('tests.select.common').Runner
+
+local run = Runner:new(it, 'tests/select/lua', {
+  tabstop = 2,
+  shiftwidth = 2,
+  softtabstop = 0,
+  expandtab = true,
+})
+
+describe('command equality Lua:', function()
+  run:compare_cmds('selection_mode.lua', { row = 3, col = 0, cmds = { 'dim', 'k_D' } })
+end)