C++: Grammar improvements to query help text

Author: paldepind

cpp/ql/src/Security/CWE/CWE-190/TaintedAllocationSize.qhelp

@@ -4,15 +4,15 @@
 <qhelp>
 <overview>
 
-<p>This code allocates memory using a size value based on user input
+<p>This code allocates memory using a size value based on user input,
 with no apparent bound on its magnitude being established. This allows
-for arbitrary amounts of memory being allocated.</p>
+for arbitrary amounts of memory to be allocated.</p>
 
 <p>If the allocation size is calculated by multiplying user input by a
-<code>sizeof</code> expression the multiplication can overflow. When
+<code>sizeof</code> expression, the multiplication can overflow. When
 an integer multiplication overflows in C, the result wraps around and
 can be much smaller than intended. A later attempt to write data into
-the allocated memory can then be out-of-bounds.</p>
+the allocated memory can then be out of bounds.</p>
 
 </overview>
 <recommendation>