Used bang in file-header

src/rules/fileHeaderRule.ts

@@ -83,7 +83,7 @@ export class Rule extends Lint.Rules.AbstractRule {
         const maybeCarriageReturn = sourceFile.text[sourceFile.getLineEndOfPosition(0)] === "\r" ? "\r" : "";
         const lineEnding = `${maybeCarriageReturn}\n`;
         return lineEnding.repeat(leadingNewlines) + [
-            "/*",
+            "/*!",
             // split on both types of line endings in case users just typed "\n" in their configs
             // but are working in files with \r\n line endings
             ...commentText.split(/\r?\n/g).map((line) => ` * ${line}`),

test/rules/file-header/bad-shebang/test.ts.fix

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-/*
+/*!
  * Good header 2
  */
 

test/rules/file-header/bad-single-line/test.ts.fix

@@ -1,4 +1,4 @@
-/*
+/*!
  * Good header 2
  */
 

test/rules/file-header/bad-use-strict/test.ts.fix

@@ -1,4 +1,4 @@
-/*
+/*!
  * Good header 2
  */
 

test/rules/file-header/bad/test.ts.fix

@@ -1,4 +1,4 @@
-/*
+/*!
  * Good header 2
  */