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-rw-r--r--doc/tutorial.md8
1 files changed, 6 insertions, 2 deletions
diff --git a/doc/tutorial.md b/doc/tutorial.md
index 04fd2aae3f7..12850a92a03 100644
--- a/doc/tutorial.md
+++ b/doc/tutorial.md
@@ -216,7 +216,7 @@ while count < 10 {
 
 Although Rust can almost always infer the types of local variables, you
 can specify a variable's type by following it with a colon, then the type
-name. 
+name.
 
 ~~~~
 let monster_size: float = 57.8;
@@ -381,6 +381,10 @@ of:
 `[mut T]`                 Mutable vector with unknown size
 ------------------------- -----------------------------------------------
 
+> ***Note***: In the future, mutability for vectors may be defined by
+> the slot that contains the vector, not the type of the vector itself,
+> deprecating [mut T] syntax.
+
 In function types, the return type is specified with an arrow, as in
 the type `fn() -> bool` or the function declaration `fn foo() -> bool
 { }`.  For functions that do not return a meaningful value, you can
@@ -1951,7 +1955,7 @@ trait Printable {
 ~~~~
 
 Traits may be implemented for specific types with [impls]. An impl
-that implements a trait includes the name of the trait at the start of 
+that implements a trait includes the name of the trait at the start of
 the definition, as in the following impls of `Printable` for `int`
 and `~str`.