Reflow changelog

ChangeLog

 Changes in version 0.2.7.4-rc - 2015-10-21
-  Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series.
-  It fixes some important memory leaks, and a scary-looking (but mostly
-  harmless in practice) invalid-read bug.  It also has a few small
+  Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
+  fixes some important memory leaks, and a scary-looking (but mostly
+  harmless in practice) invalid-read bug. It also has a few small
   bugfixes, notably fixes for compilation and portability on different
   platforms. If no further significant bounds are found, the next
   release will the the official stable release.
   o Major bugfixes (security, correctness):
-    - Fix an error that could cause us to read 4 bytes before
-      the beginning of an openssl string. This bug could be used to
-      cause Tor to crash on systems with unusual malloc implementations, or
+    - Fix an error that could cause us to read 4 bytes before the
+      beginning of an openssl string. This bug could be used to cause
+      Tor to crash on systems with unusual malloc implementations, or
       systems with unusual hardening installed. Fixes bug 17404; bugfix
       on 0.2.3.6-alpha.