Merge pull request #3902 from hfossli/patch-2

GenericsManifesto.md – fixed a formatting problem

Author: gribozavr

docs/GenericsManifesto.md

@@ -111,7 +111,8 @@ extension Collection {
 `let` constants could be allowed to have generic parameters, such that they produce differently-typed values depending on how they are used. For example, this is particularly useful for named literal values, e.g.,
 
 ```Swift
-let π<T : ExpressibleByFloatLiteral>: T = 3.141592653589793238462643383279502884197169399```
+let π<T : ExpressibleByFloatLiteral>: T = 3.141592653589793238462643383279502884197169399
+```
 
 The Clang importer could make particularly good use of this when importing macros.