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Make comments on example clearer

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I actually struggled because I overlooked the fact that I needed to change the 2.1 to "A+". 

So I wanted to make things clearer for future rustlings.
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John Heath 2020-08-24 22:37:31 +01:00 committed by GitHub
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exercises/generics/generics3.rs
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@ -4,8 +4,11 @@
// However, the school also issues alphabetical grades (A+ -> F-) and needs // However, the school also issues alphabetical grades (A+ -> F-) and needs
// to be able to print both types of report card! // to be able to print both types of report card!
// Make the necessary code changes to support alphabetical report cards, thereby making // Make the necessary code changes in the struct ReportCard and the impl block
// the second test pass. // to support alphabetical report cards. Change the Grade in the second test to "A+"
// to show that your changes allow alphabetical grades.
// Execute 'rustlings hint generics3' for hints!
// I AM NOT DONE // I AM NOT DONE