.simplecov in loog-0.3.0 vs .simplecov in loog-0.3.1

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 # Copyright (c) 2019 Yegor Bugayenko
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the 'Software'), to deal
 # in the Software without restriction, including without limitation the rights
@@ -16,23 +18,23 @@
 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-if Gem.win_platform? then
+if Gem.win_platform?
   SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
     SimpleCov::Formatter::HTMLFormatter
   ]
   SimpleCov.start do
-    add_filter "/test/"
-    add_filter "/features/"
+    add_filter '/test/'
+    add_filter '/features/'
   end
 else
   SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter.new(
     [SimpleCov::Formatter::HTMLFormatter]
   )
   SimpleCov.start do
-    add_filter "/test/"
-    add_filter "/features/"
+    add_filter '/test/'
+    add_filter '/features/'
     minimum_coverage 60
   end
 end