[12.x] Add missing separators to Stringable::ucwords (#57688)

* add missing separators to Stringable `ucwords`

* Update Stringable.php

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: kichetof

src/Illuminate/Support/Stringable.php

@@ -1110,11 +1110,12 @@ public function ucfirst()
     /**
      * Capitalize the first character of each word in a string.
      *
+     * @param  string  $separators
      * @return static
      */
-    public function ucwords()
+    public function ucwords($separators = " \t\r\n\f\v")
     {
-        return new static(Str::ucwords($this->value));
+        return new static(Str::ucwords($this->value, $separators));
     }
 
     /**

tests/Support/SupportStringableTest.php

@@ -180,6 +180,16 @@ public function testCanBeLimitedByWords()
         $this->assertSame('Taylor Otwell', (string) $this->stringable('Taylor Otwell')->words(3));
     }
 
+    public function testUcwords()
+    {
+        $this->assertSame('Laravel', (string) $this->stringable('laravel')->ucwords());
+        $this->assertSame('Laravel Framework', (string) $this->stringable('laravel framework')->ucwords());
+        $this->assertSame('Laravel-Framework', (string) $this->stringable('laravel-framework')->ucwords('-'));
+        $this->assertSame('Мама', (string) $this->stringable('мама')->ucwords());
+        $this->assertSame('Мама Мыла Раму', (string) $this->stringable('мама мыла раму')->ucwords());
+        $this->assertSame('JJ Watt', (string) $this->stringable('JJ watt')->ucwords());
+    }
+
     public function testUnless()
     {
         $this->assertSame('unless false', (string) $this->stringable('unless')->unless(false, function ($stringable, $value) {