Changes

<span style="color:#6600FF;">NSString</span> *nsstring1 = [<span style="color:#6600FF;">NSString</span> <span style="color:#660099;">initWithFormat</span>:<span style="color:#CC0000;">@"Open"</span>];

<span style="color:#6600FF;">NSString</span> *nsstring2 = [<span style="color:#6600FF;">NSString</span> <span style="color:#660099;">initWithFormat</span>:<span style="color:#CC0000;">@"Source!"</span>];

<span style="color:#6600FF;">NSString</span> *nsnewstring;

nsnewstring = [nsstring1 <span style="color:#660099;">stringByAppendingString</span>:nsstring2];