Add bin and edit workflow

bin/gems/facets-3.1.0/lib/standard/facets/yaml/file.rb

@@ -0,0 +1,41 @@
+require 'yaml'
+
+module YAML
+
+  # Provides a simplistic way to check if a file is a YAML formatted
+  # file:
+  #
+  #   YAML.file?('project.yaml')  #=> true
+  #   YAML.file?('project.xml')   #=> false
+  #
+  # Note this isn't perfect. At present it depends on the use
+  # use of an initial document separator (eg. '---'). With
+  # YAML 1.1 the %YAML delaration is supposed to be manditory,
+  # so in the future this can be adapted to fit that standard.
+
+  def self.file?(file)
+    File.open(file) do |f|
+      until f.eof?
+        line = f.gets
+        break true if line =~ /^---/
+        break false unless line =~ /^(\s*#.*?|\s*)$/
+      end
+    end
+  end
+
+end
+
+
+class File
+
+  # Same as `YAML.file?(file)`.
+  #
+  #   File.yaml?('project.yaml')  #=> true
+  #   File.yaml?('project.xml')   #=> false
+  #
+  def self.yaml?(file)
+    YAML.file?(file)
+  end
+
+end
+