Update announcement

* update list of failing parrot modules (only one)
* missing fullstop, [ptc]++
* more consistent use of markup

docs/announce/2015.02.md

@@ -10,8 +10,7 @@ available from <http://rakudo.org/downloads/star/>.
 This Rakudo Star release comes with support for the MoarVM
 backend (all module tests pass on supported platforms) along with
 experimental support for the JVM backend (some module tests fail).
-Three shipped modules are known to fail on Parrot (zavolaj (NativeCall),
-jsonrpc and doc)
+One shipped module is known to fail on Parrot (jsonrpc).
 
 In the Perl 6 world, we make a distinction between the language
 ("Perl 6") and specific implementations of the language such as
@@ -40,10 +39,10 @@ Some of the new compiler features added to this release include:
   parameter (|c).
 + `6;` at unit start is no longer a way to say `no strict;`.  It was deemed
   to be a bad meme and huffmannized inappropriately.
-+ Coercion syntax now works in signatures: sub foo(Str(Any) $a) { ... }
++ Coercion syntax now works in signatures: `sub foo(Str(Any) $a) { ... }`
   will take Any value as its first positional parameter, and coerce it to
-  Str before making it available in $a.  Note that Str(Any) can be shortened
-  to Str().
+  `Str` before making it available in `$a`.  Note that `Str(Any)` can be shortened
+  to `Str()`.
 + `sub MAIN;` (as in, rest of file is the MAIN unit) has been implemented.
 + Metaop `=` now respects the precedence of the op it is meta-ing.
 + Many optimizations, improved error messages and bugs fixed (over