Expand usage tracking

lib/liquid/context.rb

@@ -219,12 +219,16 @@ module Liquid
     def try_variable_find_in_environments(key, raise_on_not_found:)
       @environments.each do |environment|
         found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
+        Usage.increment("environment_has_a_default_proc") if environment.respond_to?(:default_proc) && environment.default_proc
+        Usage.increment("environment_has_key_but_is_nil") if environment.respond_to?(:key?) && environment.key?(key) && found_variable.nil?
         if !found_variable.nil? || @strict_variables && raise_on_not_found
           return found_variable
         end
       end
       @static_environments.each do |environment|
         found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
+        Usage.increment("static_environment_has_a_default_proc") if environment.respond_to?(:default_proc) && environment.default_proc
+        Usage.increment("static_environment_has_key_but_is_nil") if environment.respond_to?(:key?) && environment.key?(key) && found_variable.nil?
         if !found_variable.nil? || @strict_variables && raise_on_not_found
           return found_variable
         end

lib/liquid/standardfilters.rb

@@ -423,7 +423,6 @@ module Liquid
 
     def default(input, default_value = '')
       if !input || input.respond_to?(:empty?) && input.empty?
-        Usage.increment("default_filter_received_false_value") if input == false # See https://github.com/Shopify/liquid/issues/1127
         default_value
       else
         input