prefer-starts-ends-with: Fix pipe in regex (#783)

Co-authored-by: fisker Cheung <[email protected]>

Author: Tim Allen

rules/prefer-starts-ends-with.js

@@ -11,7 +11,7 @@ const doesNotContain = (string, characters) => characters.every(character => !st
 
 const isSimpleString = string => doesNotContain(
 	string,
-	['^', '$', '+', '[', '{', '(', '\\', '.', '?', '*']
+	['^', '$', '+', '[', '{', '(', '\\', '.', '?', '*', '|']
 );
 
 const regexTestSelector = [

test/prefer-starts-ends-with.js

@@ -26,7 +26,9 @@ const validRegex = [
 	/\^foo/,
 	/^foo/i,
 	/^foo/m,
-	/^foo/im
+	/^foo/im,
+	/^A|B/,
+	/A|B$/
 ];
 
 const invalidRegex = [