suprise to surprise
Typo: Missing “)” in 2012-12-10-instancetype

Added a missing closing parenthesis “)” to a sentence near the end of 2012-12-10-instancetype.
Merge pull request #136 from capnslipp/patch-1

Typo: Missing “)” in 2012-12-10-instancetype
Merge pull request #135 from carsonmcdonald/plugintypo

Change suprise to surprise
Adding missing descriptions
Adding UIActivityViewController article