adjust error message

lib/params/base_validator.rb

@@ -75,7 +75,7 @@ module Params
         return
       end
 
-      raise_error(message || "#{key} must follow the email format")
+      raise_error(message || "#{key} must follow the email format: '#{params[key]}'")
     end
 
     def unique_value(params, key, message: nil)

spec/lib/params/base_validator_spec.rb

@@ -42,7 +42,7 @@ RSpec.describe Params::BaseValidator do
       emails.each do |email|
         expect do
           validator.email_format({ email: }, :email)
-        end.to raise_error(described_class::InvalidParameterError, 'email must follow the email format')
+        end.to raise_error(described_class::InvalidParameterError, "email must follow the email format: '#{email}'")
       end
     end
 
@@ -97,7 +97,7 @@ RSpec.describe Params::BaseValidator do
       emails.each do |email|
         expect do
           validator.email_format({ email: }, :email)
-        end.to raise_error(described_class::InvalidParameterError, 'email must follow the email format')
+        end.to raise_error(described_class::InvalidParameterError, "email must follow the email format: '#{email}'")
       end
     end