Incorrect regular expression match+replace for HTML injection, when no line breaks

[danielweck]

https://github.com/readium/SDKLauncher-OSX/blob/develop/LauncherOSX/PackageResourceServer.mm#L133

NSString *pattern = @"(<head.*>)";

To reproduce: any HTML file without line breaks results in the injected scripts being appended to the HTML, resulting in a WebView parsing error displayed at the top of the view.

Same problem in Android: readium/SDKLauncher-Android#45
and iOS: readium/readium-sdk#136

[danielweck]

This regular expression works:
NSString *pattern = @"(<head[^>]*>)";

[danielweck]

Fixed:
b7f2ef5