PSR2/EndFileNewline: check files using only short open echo tag

As per the standard:
> All PHP files MUST end with a single blank line

This does not exclude files which are mixed PHP/HTML.

Includes unit tests.

package.xml

@@ -1299,6 +1299,13 @@ http://pear.php.net/dtd/package-2.0.xsd">
         <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.9.inc.fixed" role="test" />
         <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.10.inc" role="test" />
         <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.10.inc.fixed" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.11.inc" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.11.inc.fixed" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.12.inc" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.12.inc.fixed" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.13.inc" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.13.inc.fixed" role="test" />
+        <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.14.inc" role="test" />
         <file baseinstalldir="PHP/CodeSniffer" name="EndFileNewlineUnitTest.php" role="test" />
        </dir>
        <dir name="Methods">

src/Standards/PSR2/Sniffs/Files/EndFileNewlineSniff.php

@@ -23,7 +23,10 @@ class EndFileNewlineSniff implements Sniff
      */
     public function register()
     {
-        return [T_OPEN_TAG];
+        return [
+            T_OPEN_TAG,
+            T_OPEN_TAG_WITH_ECHO,
+        ];
 
     }//end register()
 

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.11.inc

@@ -0,0 +1 @@
+<?= 'foo';

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.11.inc.fixed

@@ -0,0 +1 @@
+<?= 'foo';

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.12.inc

@@ -0,0 +1 @@
+<?= 'foo' ?>

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.12.inc.fixed

@@ -0,0 +1 @@
+<?= 'foo' ?>

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.13.inc

@@ -0,0 +1,5 @@
+<?= 'foo'
+
+
+
+

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.13.inc.fixed

@@ -0,0 +1 @@
+<?= 'foo'

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.14.inc

@@ -0,0 +1 @@
+<?= 'foo' ?>

src/Standards/PSR2/Tests/Files/EndFileNewlineUnitTest.php

@@ -35,6 +35,10 @@ public function getErrorList($testFile='')
         case 'EndFileNewlineUnitTest.9.inc':
         case 'EndFileNewlineUnitTest.10.inc':
             return [2 => 1];
+        case 'EndFileNewlineUnitTest.11.inc':
+        case 'EndFileNewlineUnitTest.12.inc':
+        case 'EndFileNewlineUnitTest.13.inc':
+            return [1 => 1];
         default:
             return [];
         }//end switch