Use SPDX license format and update some formatting

Cargo.toml

@@ -3,11 +3,11 @@ name = "proc-macro-crate"
 version = "1.2.1"
 authors = ["Bastian Köcher <[email protected]>"]
 edition = "2018"
-categories = [ "development-tools::procedural-macro-helpers" ]
+categories = ["development-tools::procedural-macro-helpers"]
 documentation = "https://docs.rs/proc-macro-crate"
 repository = "https://github.com/bkchr/proc-macro-crate"
-keywords = [ "macro-rules", "crate", "macro", "proc-macro" ]
-license = "Apache-2.0/MIT"
+keywords = ["macro-rules", "crate", "macro", "proc-macro"]
+license = "MIT OR Apache-2.0"
 description = """
 Replacement for crate (macro_rules keyword) in proc-macros
 """

README.md

@@ -1,7 +1,7 @@
 # proc-macro-crate
 
 
-[![](https://docs.rs/proc-macro-crate/badge.svg)](https://docs.rs/proc-macro-crate/) [![](https://img.shields.io/crates/v/proc-macro-crate.svg)](https://crates.io/crates/proc-macro-crate) [![](https://img.shields.io/crates/d/proc-macro-crate.png)](https://crates.io/crates/proc-macro-crate) [![Build Status](https://travis-ci.org/bkchr/proc-macro-crate.png?branch=master)](https://travis-ci.org/bkchr/proc-macro-crate)
+[![](https://docs.rs/proc-macro-crate/badge.svg)](https://docs.rs/proc-macro-crate) [![](https://img.shields.io/crates/v/proc-macro-crate.svg)](https://crates.io/crates/proc-macro-crate) [![](https://img.shields.io/crates/d/proc-macro-crate.svg)](https://crates.io/crates/proc-macro-crate) [![Build Status](https://travis-ci.org/bkchr/proc-macro-crate.svg?branch=master)](https://travis-ci.org/bkchr/proc-macro-crate)
 
 Providing support for `$crate` in procedural macros.
 
@@ -13,7 +13,7 @@ Providing support for `$crate` in procedural macros.
 
 In `macro_rules!` `$crate` is used to get the path of the crate where a macro is declared in. In
 procedural macros there is currently no easy way to get this path. A common hack is to import the
-desired crate with a know name and use this. However, with rust edition 2018 and dropping
+desired crate with a know name and use this. However, with Rust edition 2018 and dropping
 `extern crate` declarations from `lib.rs`, people start to rename crates in `Cargo.toml` directly.
 However, this breaks importing the crate, as the proc-macro developer does not know the renamed
 name of the crate that should be imported.
@@ -49,9 +49,9 @@ fn import_my_crate() {
 
 Licensed under either of
 
- * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0)
 
- * [MIT license](http://opensource.org/licenses/MIT)
+ * [MIT license](https://opensource.org/licenses/MIT)
 
 at your option.