Improve test coverage of the LanguageConstructSpacing sniff

This sniff has an `else if` condition
(https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/c855348766a424d23425eba5cc4420e26e4a3e38/src/Standards/Generic/Sniffs/WhiteSpace/LanguageConstructSpacingSniff.php#L131)
to handle language constructs that are followed by some content without
a space or opening parenthesis first. This code was not exercised by the
automated tests.

This commit adds a few examples to make sure this part of the code is
covered.

Author: rodrigoprimo

src/Standards/Generic/Tests/WhiteSpace/LanguageConstructSpacingUnitTest.1.inc

@@ -2,32 +2,42 @@
 echo $blah;
 echo    $blah;
 echo($blah);
+echo$blah;
 
 print $blah;
 print     $blah;
 print($blah);
+print$blah;
 
 include $blah;
 include     $blah;
 include($blah);
+include$blah;
 
 include_once $blah;
 include_once     $blah;
 include_once($blah);
+include_once$blah;
 
 require $blah;
 require     $blah;
 require($blah);
+require$blah;
 
 require_once $blah;
 require_once     $blah;
 require_once($blah);
+require_once$blah;
 
 $obj = new MyClass();
 $obj = new    MyClass();
 
+$obj = new $className();
+$obj = new$className();
+
 yield $blah;
 yield   $blah;
+yield$blah;
 
 yield from $test();
 yield FROM   $test();
@@ -39,12 +49,16 @@ yield
 
 
 From $test();
+yield FROM$test();
 
 throw new Exception();
 throw  new Exception();
 throw new   Exception();
 throw   new   Exception();
 
+throw $exception;
+throw$exception;
+
 namespace MyClass;
 namespace    MyClass;
 namespace MyNamespace\MyClass;
@@ -66,6 +80,7 @@ return;
 return $blah;
 return   $blah;
 return($blah);
+return$blah;
 
 return	$tab;
 return

src/Standards/Generic/Tests/WhiteSpace/LanguageConstructSpacingUnitTest.1.inc.fixed

@@ -2,30 +2,40 @@
 echo $blah;
 echo $blah;
 echo($blah);
+echo $blah;
 
 print $blah;
 print $blah;
 print($blah);
+print $blah;
 
 include $blah;
 include $blah;
 include($blah);
+include $blah;
 
 include_once $blah;
 include_once $blah;
 include_once($blah);
+include_once $blah;
 
 require $blah;
 require $blah;
 require($blah);
+require $blah;
 
 require_once $blah;
 require_once $blah;
 require_once($blah);
+require_once $blah;
 
 $obj = new MyClass();
 $obj = new MyClass();
 
+$obj = new $className();
+$obj = new $className();
+
+yield $blah;
 yield $blah;
 yield $blah;
 
@@ -35,12 +45,16 @@ YIELD from $test();
 yield from $test();
 yield from $test();
 yield From $test();
+yield FROM $test();
 
 throw new Exception();
 throw new Exception();
 throw new Exception();
 throw new Exception();
 
+throw $exception;
+throw $exception;
+
 namespace MyClass;
 namespace MyClass;
 namespace MyNamespace\MyClass;
@@ -62,6 +76,7 @@ return;
 return $blah;
 return $blah;
 return($blah);
+return $blah;
 
 return $tab;
 return $newLine;

src/Standards/Generic/Tests/WhiteSpace/LanguageConstructSpacingUnitTest.php

@@ -36,30 +36,41 @@ public function getErrorList($testFile='')
         case 'LanguageConstructSpacingUnitTest.1.inc':
             return [
                 3  => 1,
-                7  => 1,
-                11 => 1,
+                5  => 1,
+                8  => 1,
+                10 => 1,
+                13 => 1,
                 15 => 1,
-                19 => 1,
+                18 => 1,
+                20 => 1,
                 23 => 1,
-                27 => 1,
+                25 => 1,
+                28 => 1,
                 30 => 1,
                 33 => 1,
-                34 => 1,
-                35 => 1,
                 36 => 1,
-                38 => 1,
+                39 => 1,
+                40 => 1,
+                43 => 1,
                 44 => 1,
                 45 => 1,
-                46 => 2,
-                49 => 1,
-                51 => 1,
-                59 => 1,
-                61 => 1,
+                46 => 1,
+                48 => 1,
+                52 => 1,
+                55 => 1,
+                56 => 1,
+                57 => 2,
+                60 => 1,
                 63 => 1,
-                67 => 1,
-                70 => 1,
-                71 => 1,
+                65 => 1,
+                73 => 1,
                 75 => 1,
+                77 => 1,
+                81 => 1,
+                83 => 1,
+                85 => 1,
+                86 => 1,
+                90 => 1,
             ];
 
         default: