Update syn 1.0 links to syn 2.0

Author: dtolnay

builder/tests/01-parse.rs

@@ -16,7 +16,7 @@
 //     https://github.com/dtolnay/syn
 //
 //   - The DeriveInput syntax tree which represents input of a derive macro:
-//     https://docs.rs/syn/1.0/syn/struct.DeriveInput.html
+//     https://docs.rs/syn/2.0/syn/struct.DeriveInput.html
 //
 //   - An example of a derive macro implemented using Syn:
 //     https://github.com/dtolnay/syn/tree/master/examples/heapsize

builder/tests/02-create-builder.rs

@@ -40,7 +40,7 @@
 //     https://github.com/dtolnay/quote
 //
 //   - Joining together the type name + "Builder" to make the builder's name:
-//     https://docs.rs/syn/1.0/syn/struct.Ident.html
+//     https://docs.rs/syn/2.0/syn/struct.Ident.html
 
 use derive_builder::Builder;
 

builder/tests/07-repeated-field.rs

@@ -25,7 +25,7 @@
 //
 // Resources:
 //
-//   - Relevant syntax tree types:
+//   - Relevant syntax tree type:
 //     https://docs.rs/syn/2.0/syn/struct.Attribute.html
 
 use derive_builder::Builder;

builder/tests/08-unrecognized-attribute.rs

@@ -12,7 +12,7 @@
 //     https://doc.rust-lang.org/std/macro.compile_error.html
 //
 //   - Lowering a syn::Error into an invocation of compile_error:
-//     https://docs.rs/syn/1.0/syn/struct.Error.html#method.to_compile_error
+//     https://docs.rs/syn/2.0/syn/struct.Error.html#method.to_compile_error
 
 use derive_builder::Builder;
 

debug/tests/01-parse.rs

@@ -9,7 +9,7 @@
 // Resources:
 //
 //   - The DeriveInput syntax tree which represents input of a derive macro:
-//     https://docs.rs/syn/1.0/syn/struct.DeriveInput.html
+//     https://docs.rs/syn/2.0/syn/struct.DeriveInput.html
 //
 //   - An example of a derive macro implemented using Syn:
 //     https://github.com/dtolnay/syn/tree/master/examples/heapsize

debug/tests/03-custom-format.rs

@@ -15,9 +15,8 @@
 //
 // Resources:
 //
-//   - Relevant syntax tree types:
-//     https://docs.rs/syn/1.0/syn/struct.Attribute.html
-//     https://docs.rs/syn/1.0/syn/enum.Meta.html
+//   - Relevant syntax tree type:
+//     https://docs.rs/syn/2.0/syn/struct.Attribute.html
 //
 //   - Macro for applying a format string to some runtime value:
 //     https://doc.rust-lang.org/std/macro.format_args.html

debug/tests/04-type-parameter.rs

@@ -10,10 +10,10 @@
 // Resources:
 //
 //   - Representation of generics in the Syn syntax tree:
-//     https://docs.rs/syn/1.0/syn/struct.Generics.html
+//     https://docs.rs/syn/2.0/syn/struct.Generics.html
 //
 //   - A helper for placing generics into an impl signature:
-//     https://docs.rs/syn/1.0/syn/struct.Generics.html#method.split_for_impl
+//     https://docs.rs/syn/2.0/syn/struct.Generics.html#method.split_for_impl
 //
 //   - Example code from Syn which deals with type parameters:
 //     https://github.com/dtolnay/syn/tree/master/examples/heapsize

debug/tests/07-associated-type.rs

@@ -17,7 +17,7 @@
 // Resources:
 //
 //   - The relevant types in the input will be represented in this syntax tree
-//     node: https://docs.rs/syn/1.0/syn/struct.TypePath.html
+//     node: https://docs.rs/syn/2.0/syn/struct.TypePath.html
 
 use derive_debug::CustomDebug;
 use std::fmt::Debug;

seq/tests/01-parse-header.rs

@@ -15,7 +15,7 @@
 // Resources:
 //
 //   - Parsing in Syn:
-//     https://docs.rs/syn/1.0/syn/parse/index.html
+//     https://docs.rs/syn/2.0/syn/parse/index.html
 //
 //   - An example of a function-like procedural macro implemented using Syn:
 //     https://github.com/dtolnay/syn/tree/master/examples/lazy-static

seq/tests/04-paste-ident.rs

@@ -18,7 +18,7 @@
 // Resources:
 //
 //     - Example of creating a new Ident from a string:
-//       https://docs.rs/syn/1.0/syn/struct.Ident.html
+//       https://docs.rs/syn/2.0/syn/struct.Ident.html
 
 use seq::seq;