C++: fix inc.qhelp files and change notes

cpp/ql/src/Security/CWE/CWE-120/OverrunWriteRecommendation.inc.qhelp

@@ -2,9 +2,7 @@
   "-//Semmle//qhelp//EN"
   "qhelp.dtd">
 <qhelp>
-<fragment>
 <recommendation>
 <p>Always control the length of buffer copy and buffer write operations. <code>strncpy</code> should be used over <code>strcpy</code>, <code>snprintf</code> over <code>sprintf</code>, and in other cases 'n-variant' functions should be preferred.</p>
 </recommendation>
-</fragment>
 </qhelp>

cpp/ql/src/Security/CWE/CWE-120/OverrunWriteReferences.inc.qhelp

@@ -2,7 +2,6 @@
   "-//Semmle//qhelp//EN"
   "qhelp.dtd">
 <qhelp>
-<fragment>
 <references>
 
 <li>CERT C Coding Standard: <a href="https://www.securecoding.cert.org/confluence/display/c/STR31-C.+Guarantee+that+storage+for+strings+has+sufficient+space+for+character+data+and+the+null+terminator">STR31-C. Guarantee that storage for strings has sufficient space for character data and the null terminator</a>.</li>
@@ -12,5 +11,4 @@
  -->
 
 </references>
-</fragment>
 </qhelp>

cpp/ql/src/change-notes/2021-12-14-overruning-write-split.md

@@ -1,2 +1,4 @@
-lgtm,codescanning
+---
+category: newQuery
+---
 * A new `cpp/very-likely-overruning-write` query has been added to the default query suite for C/C++. The query reports some results that were formerly flagged by `cpp/overruning-write`.