[ruby/prism] More closely match CRuby error messages

https://github.com/ruby/prism/commit/1ed07a0c6d

2 files changed, 16 insertions, 16 deletions

diff --git a/prism/diagnostic.c b/prism/diagnostic.c
index 925ccce4f0..c537d373aa 100644
--- a/prism/diagnostic.c
+++ b/prism/diagnostic.c
@@ -192,7 +192,7 @@ static const char* const diagnostic_messages[PM_DIAGNOSTIC_ID_LEN] = {
     [PM_ERR_MULTI_ASSIGN_MULTI_SPLATS]          = "multiple splats in multiple assignment",
     [PM_ERR_NOT_EXPRESSION]                     = "expected an expression after `not`",
     [PM_ERR_NUMBER_LITERAL_UNDERSCORE]          = "number literal ending with a `_`",
-    [PM_ERR_NUMBERED_PARAMETER_NOT_ALLOWED]     = "numbered parameters are not allowed alongside explicit parameters",
+    [PM_ERR_NUMBERED_PARAMETER_NOT_ALLOWED]     = "numbered parameters are not allowed when an ordinary parameter is defined",
     [PM_ERR_NUMBERED_PARAMETER_OUTER_SCOPE]     = "numbered parameter is already used in outer scope",
     [PM_ERR_OPERATOR_MULTI_ASSIGN]              = "unexpected operator for a multiple assignment",
     [PM_ERR_OPERATOR_WRITE_ARGUMENTS]           = "unexpected operator after a call with arguments",
@@ -204,7 +204,7 @@ static const char* const diagnostic_messages[PM_DIAGNOSTIC_ID_LEN] = {
     [PM_ERR_PARAMETER_NAME_REPEAT]              = "repeated parameter name",
     [PM_ERR_PARAMETER_NO_DEFAULT]               = "expected a default value for the parameter",
     [PM_ERR_PARAMETER_NO_DEFAULT_KW]            = "expected a default value for the keyword parameter",
-    [PM_ERR_PARAMETER_NUMBERED_RESERVED]        = "%.2s is reserved for a numbered parameter",
+    [PM_ERR_PARAMETER_NUMBERED_RESERVED]        = "%.2s is reserved for numbered parameters",
     [PM_ERR_PARAMETER_ORDER]                    = "unexpected parameter order",
     [PM_ERR_PARAMETER_SPLAT_MULTI]              = "unexpected multiple `*` splat parameters",
     [PM_ERR_PARAMETER_STAR]                     = "unexpected parameter `*`",
diff --git a/test/prism/errors_test.rb b/test/prism/errors_test.rb
index 9b6cf55fd5..31e01fa035 100644
--- a/test/prism/errors_test.rb
+++ b/test/prism/errors_test.rb
@@ -608,15 +608,15 @@ module Prism
       end
       RUBY
       assert_errors expected, source, [
-        ["_1 is reserved for a numbered parameter", 8..10],
-        ["_2 is reserved for a numbered parameter", 14..16],
-        ["_3 is reserved for a numbered parameter", 20..22],
-        ["_4 is reserved for a numbered parameter", 26..28],
-        ["_5 is reserved for a numbered parameter", 32..34],
-        ["_6 is reserved for a numbered parameter", 40..42],
-        ["_7 is reserved for a numbered parameter", 46..48],
-        ["_8 is reserved for a numbered parameter", 52..54],
-        ["_9 is reserved for a numbered parameter", 58..60],
+        ["_1 is reserved for numbered parameters", 8..10],
+        ["_2 is reserved for numbered parameters", 14..16],
+        ["_3 is reserved for numbered parameters", 20..22],
+        ["_4 is reserved for numbered parameters", 26..28],
+        ["_5 is reserved for numbered parameters", 32..34],
+        ["_6 is reserved for numbered parameters", 40..42],
+        ["_7 is reserved for numbered parameters", 46..48],
+        ["_8 is reserved for numbered parameters", 52..54],
+        ["_9 is reserved for numbered parameters", 58..60],
       ]
     end
 
@@ -1350,18 +1350,18 @@ module Prism
 
     def test_writing_numbered_parameter
       assert_errors expression("-> { _1 = 0 }"), "-> { _1 = 0 }", [
-        ["_1 is reserved for a numbered parameter", 5..7]
+        ["_1 is reserved for numbered parameters", 5..7]
       ]
     end
 
     def test_targeting_numbered_parameter
       assert_errors expression("-> { _1, = 0 }"), "-> { _1, = 0 }", [
-        ["_1 is reserved for a numbered parameter", 5..7]
+        ["_1 is reserved for numbered parameters", 5..7]
       ]
     end
 
     def test_defining_numbered_parameter
-      error_messages = ["_1 is reserved for a numbered parameter"]
+      error_messages = ["_1 is reserved for numbered parameters"]
 
       assert_error_messages "def _1; end", error_messages
       assert_error_messages "def self._1; end", error_messages
@@ -1416,7 +1416,7 @@ module Prism
     def test_numbered_parameters_in_block_arguments
       source = "foo { |_1| }"
       assert_errors expression(source), source, [
-        ["_1 is reserved for a numbered parameter", 7..9],
+        ["_1 is reserved for numbered parameters", 7..9],
       ]
     end
 
@@ -1502,7 +1502,7 @@ module Prism
         /(?<_1>)/ =~ a
       RUBY
 
-      message = "_1 is reserved for a numbered parameter"
+      message = "_1 is reserved for numbered parameters"
       assert_errors expression(source), source, [
         [message, 5..7],
         [message, 13..15],