Linter CLI: Preserve spacing in new rule hints

javascript/packages/linter/src/cli/summary-reporter.ts

@@ -299,7 +299,7 @@ export class SummaryReporter {
       for (const ruleName of ruleNames) {
         const ruleText = colorize(ruleName, "white")
         const ruleLink = hyperlink(ruleText, ruleDocumentationUrl(ruleName))
-        console.log(`  ${ruleLink} ${colorize(`(introduced in ${versionLabel})`, "gray")}`)
+        console.log(`  ${ruleLink}${colorize(` (introduced in ${versionLabel})`, "gray")}`)
       }
     }
 

javascript/packages/linter/test/summary-reporter.test.ts

@@ -0,0 +1,44 @@
+import { afterEach, describe, expect, test, vi } from "vitest"
+
+import { SummaryReporter } from "../src/cli/summary-reporter.js"
+
+import type { SummaryData } from "../src/cli/summary-reporter.js"
+
+describe("SummaryReporter", () => {
+  afterEach(() => {
+    vi.restoreAllMocks()
+  })
+
+  test("keeps the space before a version label inside its color sequence", () => {
+    const originalNoColor = process.env.NO_COLOR
+    delete process.env.NO_COLOR
+
+    const log = vi.spyOn(console, "log").mockImplementation(() => {})
+
+    try {
+      new SummaryReporter().displayVersionSkippedRules({
+        rulesSkippedByVersion: [
+          { ruleName: "html-example", introducedIn: "0.10.3" },
+        ],
+        configVersion: "0.10.3",
+        hasConfigFile: true,
+      } as SummaryData)
+
+      const ruleLine = log.mock.calls
+        .map(([line]) => line)
+        .find(
+          (line) => typeof line === "string" && line.includes("html-example"),
+        )
+
+      expect(ruleLine).toMatch(
+        /\x1b\\\x1b\[[0-9;]+m \(introduced in 0\.10\.3\)/,
+      )
+    } finally {
+      if (originalNoColor === undefined) {
+        delete process.env.NO_COLOR
+      } else {
+        process.env.NO_COLOR = originalNoColor
+      }
+    }
+  })
+})