Fix RuboCop errors

test/test_core.rb

@@ -1407,13 +1407,13 @@ class TestCore < TestInteractive
         --bind 'every(0.1):execute-silent(printf . >> #{fast})' \\
         --bind 'every(0.5):execute-silent(printf . >> #{slow})'), :Enter
     tmux.until { |lines| assert_equal 100, lines.match_count }
-    sleep 1.2
+    sleep(1.2)
     a = File.exist?(fast) ? File.size(fast) : 0
     b = File.exist?(slow) ? File.size(slow) : 0
     # Sanity: faster timer fired more times.
-    assert a > b, "fast timer should fire more (#{a} vs #{b})"
+    assert_operator a, :>, b, "fast timer should fire more (#{a} vs #{b})"
     # Sanity: slow timer fired at least once.
-    assert b >= 1, "slow timer should have fired at least once (#{b})"
+    assert_operator b, :>=, 1, "slow timer should have fired at least once (#{b})"
   ensure
     FileUtils.rm_f(fast)
     FileUtils.rm_f(slow)
@@ -1426,7 +1426,7 @@ class TestCore < TestInteractive
     tmux.until { |lines| assert_match(/^  \d{2}\.\d+/, lines[-3]) }
     tmux.send_keys :Space
     tmux.until { |lines| assert_includes lines[-3], 'STOPPED' }
-    sleep 0.4
+    sleep(0.4)
     # Header must stay STOPPED after the unbind
     assert_includes tmux.capture[-3], 'STOPPED'
   end
@@ -1462,7 +1462,7 @@ class TestCore < TestInteractive
     tmux.send_keys 'x'
     tmux.until { |lines| assert_includes lines[-1], '[x]>' }
     # every() ticks shouldn't overwrite FZF_KEY
-    sleep 1
+    sleep(1)
     assert_includes tmux.capture[-1], '[x]>'
   end
 

test/test_preview.rb

@@ -389,7 +389,7 @@ class TestPreview < TestInteractive
                    "--preview-window 'right,nowrap,border-rounded' " \
                    '--bind ctrl-w:toggle-preview-wrap ' \
                    '--bind ctrl-r:change-preview-window:border-bold', :Enter
-    sleep 2
+    sleep(2)
     # Initial: nowrap, rounded border. The long line is truncated; "wrapped" is hidden.
     tmux.until do |lines|
       assert_includes lines[2], '2nd line'