Rollup merge of #69847 - GuillaumeGomez:cleanup-e0393, r=Dylan-DPC

clean up E0393 explanation

r? @Dylan-DPC
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Mazdak Farrokhzad 2020-03-10 06:47:56 +01:00 committed by GitHub
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@ -1,5 +1,6 @@
A type parameter which references `Self` in its default value was not specified.
Example of erroneous code:
Erroneous code example:
```compile_fail,E0393
trait A<T=Self> {}