POD fix and some typos in 2015-12-20.pod

2015/articles/2015-12-20.pod

@@ -40,29 +40,29 @@ like global work queues, process synchronization, or shared leader boards.
     (nil)
     shell$
 
-L<< Redis's documentation| http://redis.io/documentation >> is very full and we
-can try the commands in L<< interactive console|http://redis.io/commands>> in
+L<Redis's documentation|http://redis.io/documentation> is very full and we
+can try the commands in L<interactive console|http://redis.io/commands> in
 a web browser!
 
 Let's introduce the CPAN modules around Redis.
 
 =head2 L<Redis>
 
-The original Redis module is an Perl interface to talk to a Redis server: 
+The original Redis module is a Perl interface to talk to a Redis server: 
 
     #!perl
     my $redis = Redis->new;
     $redis->incr('blah');
 
 Redis.pm is pure Perl implementation so, stable and easy to understand, but
-little a bit slow, especially for caching where you don't want a lot of
+a little bit slow, especially for caching where you don't want a lot of
 overhead.
 
 =head2 L<Redis::Fast>
 
 L<Redis::Fast> is an alternative faster client module for Redis.  It has
 the same Redis.pm interfaces built using XS, so "Fast".  You can use
-Redis::Fast instead of Redis.pm without making an code changes other than
+Redis::Fast instead of Redis.pm without making any code changes other than
 initially instantiating a different object.
 
     #!perl
@@ -78,7 +78,7 @@ L<Cache::Cache> is a standard caching interface while allows you to easily swap
 out backend caching technologies - in memory stores, on disk files, memcache,
 etc - without making changes to your code.
 
-I wanted to use Redis as caching storage so I wrote L<Cache::Cache> compatible
+I wanted to use Redis as caching storage so I wrote a L<Cache::Cache> compatible
 interface client library for Redis called Cache::Redis:
 
     #!perl
@@ -98,7 +98,7 @@ it can store.
 
 Redis's "sorted set" is very useful for creating leaderboards but, which don't
 return "unique" rank (cf. L<https://github.com/antirez/redis/issues/943>>). So I
-wrote the ranking module using Redis which care "unique" rank.
+wrote the ranking module using Redis which takes care of "unique" rank.
 
     #!perl
     use Redis::Fast;
@@ -159,4 +159,4 @@ power of Redis from Perl.
 * L<Cache::Redis> an L<Cache::Cache>
 * L<Redis::LeaderBoard>
 * L<Redis::Namespace>
-* L<< Redis's documentation| http://redis.io/documentation >>
+* L<Redis's documentation|http://redis.io/documentation>