Improve description for the lineHeight setting to reflect the proposed changes

src/vs/editor/common/config/editorOptions.ts

@@ -2478,7 +2478,7 @@ class EditorLineHeight extends EditorFloatOption<EditorOption.lineHeight> {
 			EditorOption.lineHeight, 'lineHeight',
 			EDITOR_FONT_DEFAULTS.lineHeight,
 			x => EditorFloatOption.clamp(x, 0, 150),
-			{ description: nls.localize('lineHeight', "Controls the line height. Use 0 to compute the line height from the font size.") }
+			{ markdownDescription: nls.localize('lineHeight', "Controls the line height. \n - Use 0 to automatically compute the line height from the font size.\n - Values between 0 and 8 will be used as a multiplier with the font size.\n - Values greater than 8 will be used as effective values.") }
 		);
 	}