Fixed grammatical error in predefined constants for filter_var() sanitization series (#4848)

Author: andyfeldman

reference/filter/constants.xml

@@ -990,7 +990,7 @@
    </term>
    <listitem>
     <simpara>
-     Sanitize the string by remove all characters except
+     Sanitize the string by removing all characters except
      latin letters (<literal>[a-zA-Z]</literal>),
      digits (<literal>[0-9]</literal>),
      and the special characters
@@ -1005,7 +1005,7 @@
    </term>
    <listitem>
     <simpara>
-     Sanitize the string by remove all characters except
+     Sanitize the string by removing all characters except
      latin letters (<literal>[a-zA-Z]</literal>),
      digits (<literal>[0-9]</literal>),
      and the special characters
@@ -1020,7 +1020,7 @@
    </term>
    <listitem>
     <simpara>
-     Sanitize the string by remove all characters except digits
+     Sanitize the string by removing all characters except digits
      (<literal>[0-9]</literal>), plus sign (<literal>+</literal>),
      and minus sign (<literal>-</literal>).
     </simpara>
@@ -1033,7 +1033,7 @@
    </term>
    <listitem>
     <simpara>
-     Sanitize the string by remove all characters except digits
+     Sanitize the string by removing all characters except digits
      (<literal>[0-9]</literal>), plus sign (<literal>+</literal>),
      and minus sign (<literal>-</literal>).
     </simpara>