1 files changed, 10 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/loading.rb b/activesupport/lib/active_support/core_ext/module/loading.rb
index 36c0c61405..4b4b110b25 100644
--- a/activesupport/lib/active_support/core_ext/module/loading.rb
+++ b/activesupport/lib/active_support/core_ext/module/loading.rb
@@ -1,4 +1,14 @@
 class Module
+  # Returns String#underscore applied to the module name minus trailing classes.
+  #
+  #   ActiveRecord.as_load_path               # => "active_record"
+  #   ActiveRecord::Associations.as_load_path # => "active_record/associations"
+  #   ActiveRecord::Base.as_load_path         # => "active_record" (Base is a class)
+  #
+  # The Kernel module gives an empty string by definition.
+  #
+  #   Kernel.as_load_path # => ""
+  #   Math.as_load_path   # => "math"
   def as_load_path
     if self == Object || self == Kernel
       ''