Fix sheet name escaping

Sheet names are stored as attributes of an XML entity. We therefore need a different escaping strategy, escaping quotes.

tests/Spout/Common/Helper/Escaper/ODSTest.php

@@ -17,7 +17,7 @@ class ODSTest extends TestCase
     {
         return [
             ['test', 'test'],
-            ['carl\'s "pokemon"', 'carl\'s "pokemon"'],
+            ['carl\'s "pokemon"', 'carl's "pokemon"'],
             ["\n", "\n"],
             ["\r", "\r"],
             ["\t", "\t"],

tests/Spout/Common/Helper/Escaper/XLSXTest.php

@@ -17,7 +17,7 @@ class XLSXTest extends TestCase
     {
         return [
             ['test', 'test'],
-            ['adam\'s "car"', 'adam\'s "car"'],
+            ['adam\'s "car"', 'adam's "car"'],
             ["\n", "\n"],
             ["\r", "\r"],
             ["\t", "\t"],
@@ -26,7 +26,7 @@ class XLSXTest extends TestCase
             ['_x0000_', '_x005F_x0000_'],
             [chr(21), '_x0015_'],
             ['control ' . chr(21) . ' character', 'control _x0015_ character'],
-            ['control\'s ' . chr(21) . ' "character"', 'control\'s _x0015_ "character"'],
+            ['control\'s ' . chr(21) . ' "character"', 'control's _x0015_ "character"'],
         ];
     }