Remove all references to "hack" from the source code

Remove the term "hack" from the source code to prevent it
from being flagged by malware scanners and audit tools (such as
the very popular myJoomla.com for Joomla sites)

src/PhpSpreadsheet/Reader/Xls.php

@@ -7406,7 +7406,7 @@ class Xls extends BaseReader implements IReader
     {
         // FIX: represent numbers correctly on 64-bit system
         // http://sourceforge.net/tracker/index.php?func=detail&aid=1487372&group_id=99160&atid=623334
-        // Hacked by Andreas Rehm 2006 to ensure correct result of the <<24 block on 32 and 64bit systems
+        // Changed by Andreas Rehm 2006 to ensure correct result of the <<24 block on 32 and 64bit systems
         $_or_24 = ord($data[$pos + 3]);
         if ($_or_24 >= 128) {
             // negative number

src/PhpSpreadsheet/Shared/JAMA/Matrix.php

@@ -45,7 +45,7 @@ class Matrix
     /**
      *    Polymorphic constructor
      *
-     *    As PHP has no support for polymorphic constructors, we hack our own sort of polymorphism using func_num_args, func_get_arg, and gettype. In essence, we're just implementing a simple RTTI filter and calling the appropriate constructor.
+     *    As PHP has no support for polymorphic constructors, we use tricks to make our own sort of polymorphism using func_num_args, func_get_arg, and gettype. In essence, we're just implementing a simple RTTI filter and calling the appropriate constructor.
      */
     public function __construct()
     {

src/PhpSpreadsheet/Shared/PCLZip/gnu-lgpl.txt

@@ -146,7 +146,7 @@ such a program is covered only if its contents constitute a work based
 on the Library (independent of the use of the Library in a tool for
 writing it).  Whether that is true depends on what the Library does
 and what the program that uses the Library does.
-  
+
   1. You may copy and distribute verbatim copies of the Library's
 complete source code as you receive it, in any medium, provided that
 you conspicuously and appropriately publish on each copy an
@@ -494,7 +494,7 @@ school, if any, to sign a "copyright disclaimer" for the library, if
 necessary.  Here is a sample; alter the names:
 
   Yoyodyne, Inc., hereby disclaims all copyright interest in the
-  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+  library `Frob' (a library for tweaking knobs) written by John Doe.
 
   <signature of Ty Coon>, 1 April 1990
   Ty Coon, President of Vice