Fix typo in readme and crate-level documentation

README.md

@@ -261,8 +261,8 @@ well-formatted Rust code that is locally indistinguishable from rustfmt's style.
 The reason is that in the paper, the complete non-whitespace contents are
 assumed to be independent of linebreak decisions, with Scan and Print being only
 in control of the whitespace (spaces and line breaks). In Rust as idiomatically
-formattted by rustfmt, that is not the case. Trailing commas are one example;
-the punctuation is only known *after* the broken vs non-broken status of the
+formatted by rustfmt, that is not the case. Trailing commas are one example; the
+punctuation is only known *after* the broken vs non-broken status of the
 surrounding group is known:
 
 ```rust

src/lib.rs

@@ -276,7 +276,7 @@
 //! style. The reason is that in the paper, the complete non-whitespace contents
 //! are assumed to be independent of linebreak decisions, with Scan and Print
 //! being only in control of the whitespace (spaces and line breaks). In Rust as
-//! idiomatically formattted by rustfmt, that is not the case. Trailing commas
+//! idiomatically formatted by rustfmt, that is not the case. Trailing commas
 //! are one example; the punctuation is only known *after* the broken vs
 //! non-broken status of the surrounding group is known:
 //!