Experiment: Hardcode parser to :strict everywhere

Add a link to the LiquidDoc tooling reference in `doc` tag documentation

lib/liquid/environment.rb

@@ -4,10 +4,6 @@ module Liquid
   # The Environment is the container for all configuration options of Liquid, such as
   # the registered tags, filters, and the default error mode.
   class Environment
-    # The default error mode for all templates. This can be overridden on a
-    # per-template basis.
-    attr_accessor :error_mode
-
     # The tags that are available to use in the template.
     attr_accessor :tags
 
@@ -75,7 +71,7 @@ module Liquid
     # @api private
     def initialize
       @tags = Tags::STANDARD_TAGS.dup
-      @error_mode = :lax
+      @error_mode = :strict
       @strainer_template = Class.new(StrainerTemplate).tap do |klass|
         klass.add_filter(StandardFilters)
       end
@@ -85,6 +81,14 @@ module Liquid
       @strainer_template_class_cache = {}
     end
 
+    def error_mode
+      :strict
+    end
+
+    def error_mode=(mode)
+      :strict
+    end
+
     # Registers a new tag with the environment.
     #
     # @param name [String] The name of the tag.

lib/liquid/standardfilters.rb

@@ -712,7 +712,16 @@ module Liquid
       input.gsub(/\r?\n/, "<br />\n")
     end
 
-    # Reformat a date using Ruby's core Time#strftime( string ) -> string
+    # @liquid_public_docs
+    # @liquid_type filter
+    # @liquid_category date
+    # @liquid_summary
+    #   Formats a date according to a specified format string.
+    # @liquid_description
+    #   This filter formats a date using various format specifiers. If the format string is empty,
+    #   the original input is returned. If the input cannot be converted to a date, the original input is returned.
+    #
+    #   The following format specifiers can be used:
     #
     #   %a - The abbreviated weekday name (``Sun'')
     #   %A - The  full  weekday  name (``Sunday'')
@@ -741,8 +750,8 @@ module Liquid
     #   %Y - Year with century
     #   %Z - Time zone name
     #   %% - Literal ``%'' character
-    #
-    #   See also: http://www.ruby-doc.org/core/Time.html#method-i-strftime
+    # @liquid_syntax date | date: string
+    # @liquid_return [string]
     def date(input, format)
       str_format = Utils.to_s(format)
       return input if str_format.empty?

lib/liquid/tags/doc.rb

@@ -13,6 +13,10 @@ module Liquid
   #   Liquid code inside will be parsed but not executed. This facilitates
   #   tooling support for features like code completion, linting, and inline
   #   documentation.
+  #
+  #   For detailed documentation syntax and examples, see the
+  #   [`LiquidDoc` reference](/docs/storefronts/themes/tools/liquid-doc).
+  #
   # @liquid_syntax
   #   {% doc %}
   #     Renders a message.

lib/liquid/template.rb

@@ -27,11 +27,11 @@ module Liquid
       # :strict will enforce correct syntax.
       def error_mode=(mode)
         Deprecations.warn("Template.error_mode=", "Environment#error_mode=")
-        Environment.default.error_mode = mode
+        Environment.default.error_mode = :strict
       end
 
       def error_mode
-        Environment.default.error_mode
+        :strict
       end
 
       def default_exception_renderer=(renderer)