Fix warnings from lintChanges.py

changes/bug19969

@@ -1,9 +1,9 @@
-  o Major bugfixes (client performance);
+  o Major bugfixes (client performance):
     - Clients now respond to new application stream requests when
       they arrive, rather than waiting up to one second before starting
       to handle them. Fixes part of bug 19969; bugfix on 0.2.8.1-alpha.
 
-  o Major bugfixes (clients on flaky network connections);
+  o Major bugfixes (clients on flaky network connections):
     - When Tor leaves standby because of a new application request, open
       circuits as needed to serve that request. Previously, we would
       potentially wait a very long time. Fixes part of bug 19969; bugfix

changes/bug20472

@@ -1,4 +1,5 @@
   o Minor bugfixes (circuits):
     - Remove a BUG warning in circuit_pick_extend_handshake. Instead, assume
       all nodes support EXTEND2. Use ntor whenever a key is available.
-      Bugfix on commit 10aa913 from 19163 in 0.2.9.3-alpha. Fixes bug 20472.
+      Fixes bug 20472; bugfix on 0.2.9.3-alpha.
+

changes/bug20551

@@ -1,3 +1,3 @@
-  o Minor bugfixes (compilation);
+  o Minor bugfixes (compilation):
     - Fix implicit conversion warnings under OpenSSL 1.1.
       Fixes bug 20551; bugfix on 0.2.1.1-alpha.