Duplicate fragment name error has broken link

[dcecile]

trafficstars

The link in this error is broken:

https://github.com/apollographql/graphql-tag/blob/1fd2c9d0378163d76b8091dd2dbd3afc6142a34a/src/index.js#L48-L50

It'd be nice if the fixed link describe best practices (https://github.com/apollographql/apollo-client/issues/1506) and the alternative: inline fragments.

(I'm assuming inline fragments is defining a shared string like ... on X { y } without using the gql tag.)

[czabaj]

Duplicate of #188