fix specs for older ruby, again

Author: DannyBen

spec/bashly/library/base_spec.rb

@@ -34,7 +34,7 @@
 
     context "when #content is a string representing a lib/dir" do
       subject do
-        Class.new(described_class) { def content = "validations" }.new
+        Class.new(described_class) { def content; "validations"; end }.new
       end
 
       it "returns an array of hashes" do