Fix typos

Author: rodrigoprimo

src/Standards/Generic/Docs/WhiteSpace/IncrementDecrementSpacingStandard.xml

@@ -1,19 +1,19 @@
 <documentation title="Increment Decrement Spacing">
     <standard>
     <![CDATA[
-    There should be no whitespaces between variables and increment/decrement operators.
+    There should be no whitespace between variables and increment/decrement operators.
     ]]>
     </standard>
     <code_comparison>
-        <code title="Valid: No whitespaces between variables and increment/decrement operators.">
+        <code title="Valid: No whitespace between variables and increment/decrement operators.">
         <![CDATA[
 ++<em></em>$i;
 --<em></em>$i['key']['id'];
 ClassName::$prop<em></em>++;
 $obj->prop<em></em>--;
         ]]>
         </code>
-        <code title="Invalid: One or more whitespaces between variables and increment/decrement operators.">
+        <code title="Invalid: Whitespace between variables and increment/decrement operators.">
         <![CDATA[
 ++<em> </em>$i;
 --<em>   </em>$i['key']['id'];