[css] Address PR feedback for "Did you mean" suggestions

src/textual/color.py

@@ -85,7 +85,7 @@ class ColorParseError(Exception):
             message (str): the error message
             suggested_color (str | None): a close color we can suggest. Defaults to None.
         """
-        super().__init__(*[message])
+        super().__init__(message)
         self.suggested_color = suggested_color
 
 

src/textual/css/_help_renderables.py

@@ -70,13 +70,13 @@ class HelpText:
 
     Attributes:
         summary (str): A succinct summary of the issue.
-        bullets (Iterable[Bullet]): Bullet points which provide additional
-            context around the issue. These are rendered below the summary.
+        bullets (Iterable[Bullet] | None): Bullet points which provide additional
+            context around the issue. These are rendered below the summary. Defaults to None.
     """
 
-    def __init__(self, summary: str, *, bullets: Iterable[Bullet]) -> None:
+    def __init__(self, summary: str, *, bullets: Iterable[Bullet] = None) -> None:
         self.summary = summary
-        self.bullets = bullets
+        self.bullets = bullets or []
 
     def __rich_console__(
         self, console: Console, options: ConsoleOptions

src/textual/css/_help_text.py

@@ -145,13 +145,13 @@ def property_invalid_value_help_text(
         HelpText: Renderable for displaying the help text for this property
     """
     property_name = _contextualize_property_name(property_name, context)
-    bullets = []
+    summary = f"Invalid CSS property [i]{property_name}[/]"
     if suggested_property_name:
         suggested_property_name = _contextualize_property_name(
             suggested_property_name, context
         )
-        bullets.append(Bullet(f'Did you mean "{suggested_property_name}"?'))
-    return HelpText(f"Invalid CSS property [i]{property_name}[/]", bullets=bullets)
+        summary += f'. Did you mean "{suggested_property_name}"?'
+    return HelpText(summary)
 
 
 def spacing_wrong_number_of_values_help_text(
@@ -319,17 +319,15 @@ def color_property_help_text(
         HelpText: Renderable for displaying the help text for this property
     """
     property_name = _contextualize_property_name(property_name, context)
+    summary = f"Invalid value for the [i]{property_name}[/] property"
     suggested_color = (
         error.suggested_color if error and isinstance(error, ColorParseError) else None
     )
+    if suggested_color:
+        summary += f'. Did you mean "{suggested_color}"?'
     return HelpText(
-        summary=f"Invalid value for the [i]{property_name}[/] property",
+        summary=summary,
         bullets=[
-            *(
-                [Bullet(f'Did you mean "{suggested_color}"?')]
-                if suggested_color
-                else []
-            ),
             Bullet(
                 f"The [i]{property_name}[/] property can only be set to a valid color"
             ),

src/textual/css/_style_properties.py

@@ -788,7 +788,7 @@ class ColorProperty:
                     help_text=color_property_help_text(
                         self.name, context="inline", error=error
                     ),
-                ) from error
+                )
             if obj.set_rule(self.name, parsed_color):
                 obj.refresh()
         else:

tests/css/test_stylesheet.py

@@ -90,17 +90,10 @@ def test_did_you_mean_for_css_property_names(
 
     _, help_text = err.value.errors.rules[0].errors[0]  # type: Any, HelpText
     displayed_css_property_name = css_property_name.replace("_", "-")
-    assert (
-        help_text.summary == f"Invalid CSS property [i]{displayed_css_property_name}[/]"
-    )
-
-    expected_bullets_length = 1 if expected_property_name_suggestion else 0
-    assert len(help_text.bullets) == expected_bullets_length
-    if expected_property_name_suggestion is not None:
-        expected_suggestion_message = (
-            f'Did you mean "{expected_property_name_suggestion}"?'
-        )
-        assert help_text.bullets[0].markup == expected_suggestion_message
+    expected_summary = f"Invalid CSS property [i]{displayed_css_property_name}[/]"
+    if expected_property_name_suggestion:
+        expected_summary += f'. Did you mean "{expected_property_name_suggestion}"?'
+    assert help_text.summary == expected_summary
 
 
 @pytest.mark.parametrize(
@@ -134,14 +127,11 @@ def test_did_you_mean_for_color_names(
 
     _, help_text = err.value.errors.rules[0].errors[0]  # type: Any, HelpText
     displayed_css_property_name = css_property_name.replace("_", "-")
-    assert (
-        help_text.summary
-        == f"Invalid value for the [i]{displayed_css_property_name}[/] property"
+    expected_error_summary = (
+        f"Invalid value for the [i]{displayed_css_property_name}[/] property"
     )
 
-    first_bullet = help_text.bullets[0]
     if expected_color_suggestion is not None:
-        expected_suggestion_message = f'Did you mean "{expected_color_suggestion}"?'
-        assert first_bullet.markup == expected_suggestion_message
-    else:
-        assert "Did you mean" not in first_bullet.markup
+        expected_error_summary += f'. Did you mean "{expected_color_suggestion}"?'
+
+    assert help_text.summary == expected_error_summary