Clean up tests

* Remove deprecated tags;
* Improve scenarios, steps and specs descriptions.

features/actions/quit.feature

@@ -1,6 +1,6 @@
 Feature: quit action
 
-  Scenario: quits on keybing press
+  Scenario: quits on alt+q keys press
     Given uhwm is running
-    When I press the default quit key binding
+    When I press the alt+q keys
     Then uhwm should terminate successfully

features/cli/run_control.feature

@@ -1,6 +1,6 @@
 Feature: run control file path CLI option
 
-  Scenario: changes the path to run control file
+  Scenario: specifies run control file path
     Given a file named uhwmrc.rb with:
       """
       puts 'run control evaluation'

features/run_control/evaluation.feature

@@ -1,7 +1,6 @@
-@mocked_home_directory
 Feature: run control file evaluation
 
-  Scenario: evaluates the default run control file when it exists
+  Scenario: evaluates the default run control file when present
     Given a file named .uhwmrc.rb with:
       """
       puts 'run control evaluation'

features/steps/x_steps.rb

@@ -1,5 +1,5 @@
-When /^I press the default quit key binding$/ do
+When /^I press the ([^ ]+) keys?$/ do |keys|
-  x_key 'alt+q'
+  x_key keys
 end
 
 Then /^it must connect to X display$/ do

spec/uh/wm/runner_spec.rb

@@ -60,7 +60,7 @@ module Uh
       end
 
       describe '#evaluate_run_control' do
-        context 'when run control file exists' do
+        context 'when run control file is present' do
           it 'evaluates the run control file' do
             with_file 'throw :run_control' do |f|
               env.rc_path = f.path
@@ -69,7 +69,7 @@ module Uh
           end
         end
 
-        context 'when run control file does not exist' do
+        context 'when run control file is not present' do
           it 'does not raise any error' do
             expect { runner.evaluate_run_control }.not_to raise_error
           end