Remove Rubocop Performance/Caller violation

Turns out that using `caller(n..n).first` is _significantly_ faster than
`caller[n]`.

diff --git a/spec/lib/puppet_spec/compiler.rb b/spec/lib/puppet_spec/compiler.rb
index c3d33a58fc106426fedfe8e7b58a52e31cf87765..49a65349c74216729121fe8bfb26f809fc1d28e1 100644 (file)
--- a/spec/lib/puppet_spec/compiler.rb
+++ b/spec/lib/puppet_spec/compiler.rb
@@ -90,7 +90,7 @@ module PuppetSpec::Compiler
   # (Parameters given by name)
   #
   def evaluate(code: 'undef', source: nil, node: Puppet::Node.new('testnode'), variables: {})
-    source_location = caller[0]
+    source_location = caller(0..0).first
     Puppet[:code] = code
     compiler = Puppet::Parser::Compiler.new(node)
     unless variables.empty?