add GinkgoTB() to docs

Author: onsi

docs/index.md

@@ -5420,7 +5420,7 @@ ginkgo version
 
 ### Using Third-party Libraries
 
-Most third-party Go `testing` integrations (e.g. matcher libraries, mocking libraries) take and wrap a `*testing.T` to provide functionality.  Unfortunately there is no formal interface for `*testing.T` however Ginkgo provides a function, `GinkgoT()` that returns a struct that implements all the methods that `*testing.T` implements.  Most libraries accept the `*testing.T` object via an interface and you can usually simply pass in `GinkgoT()` and expect the library to work.
+Most third-party Go `testing` integrations (e.g. matcher libraries, mocking libraries) take and wrap a `*testing.T` to provide functionality.  Unfortunately there is no formal interface for `*testing.T` however Ginkgo provides a function, `GinkgoT()` that returns a struct that implements all the methods that `*testing.T` implements.  Most libraries accept the `*testing.T` object via an interface and you can usually simply pass in `GinkgoT()` and expect the library to work.  Some libraries require passing in a `testing.TB` - you can use `GinkgoTB()` for these.
 
 For example, you can choose to use [testify](https://github.com/stretchr/testify) instead of Gomega like so:
 

ginkgo_t_dsl.go

@@ -106,7 +106,6 @@ This wrapper satisfies the testing.TB interface and intended to be used as a dro
 Similar to GinkgoT(), GinkgoTB() takes an optional offset argument that can be used to get the
 correct line number associated with the failure - though you do not need to use this if you call GinkgoHelper() or GinkgoT().Helper() appropriately
 */
-
 func GinkgoTB(optionalOffset ...int) *GinkgoTBWrapper {
 	offset := 2
 	if len(optionalOffset) > 0 {