Fix remaining lintChanges warnings.

changes/bug18460

@@ -1,4 +1,4 @@
   o Minor bugfixes (statistics):
     - We now include consensus downloads via IPv6 in our directory-request statistics.
-      Fixes 18460; bugfix on 0.2.3.14-alpha.
+      Fixes bug 18460; bugfix on 0.2.3.14-alpha.
 

changes/bug19003

@@ -1,5 +1,5 @@
   o Minor bugfixes (small networks):
     - Allow directories in small networks to bootstrap by
       skipping DirPort checks when the consensus has no exits.
-      Fixes bug 19003, bugfix on 0.2.8.1-alpha.
+      Fixes bug 19003; bugfix on 0.2.8.1-alpha.
       Patch by teor.