Consistently use middle dot (·) instead of bullet (•) to separate items (#25248)

lib/linter/haml_middle_dot.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+module HamlLint
+  # Bans the usage of “•” (bullet) in HTML/HAML in favor of “·” (middle dot) in anything that will end up as a text node. (including string literals in Ruby code)
+  class Linter::MiddleDot < Linter
+    include LinterRegistry
+
+    # rubocop:disable Style/MiddleDot
+    BULLET = '•'
+    # rubocop:enable Style/MiddleDot
+    MIDDLE_DOT = '·'
+    MESSAGE = "Use '#{MIDDLE_DOT}' (middle dot) instead of '#{BULLET}' (bullet)".freeze
+
+    def visit_plain(node)
+      return unless node.text.include?(BULLET)
+
+      record_lint(node, MESSAGE)
+    end
+
+    def visit_script(node)
+      return unless node.script.include?(BULLET)
+
+      record_lint(node, MESSAGE)
+    end
+  end
+end