cxxopts/include
Masashi Fujita ec9e62c2c8 | should be inside of (…) (#87)
* `|` should be inside of `(…)`

It's possible to use `(t|true|T|True)` as `truthy_pattern` but still failing `true` as a truthy under my environment :-(

```
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
```
2017-12-04 18:15:20 +11:00
..
cxxopts.hpp | should be inside of (…) (#87) 2017-12-04 18:15:20 +11:00