Swap CxxString::as_c_str and CxxString::to_str in documentation

This order makes more sense to me: as_bytes, as_ptr, as_c_str, to_str, to_str_lossy

src/cxx_string.rs

@@ -136,18 +136,18 @@ impl CxxString {
         unsafe { string_data(self) }
     }
 
-    /// Validates that the C++ string contains UTF-8 data and produces a view of
-    /// it as a Rust &str, otherwise an error.
-    pub fn to_str(&self) -> Result<&str, Utf8Error> {
-        str::from_utf8(self.as_bytes())
-    }
-
     /// Produces a `&CStr` view of the string without additional allocations.
     pub fn as_c_str(&self) -> &CStr {
         // Since C++11, string[string.size()] is guaranteed to be \0.
         unsafe { CStr::from_ptr(self.as_ptr().cast::<c_char>()) }
     }
 
+    /// Validates that the C++ string contains UTF-8 data and produces a view of
+    /// it as a Rust &amp;str, otherwise an error.
+    pub fn to_str(&self) -> Result<&str, Utf8Error> {
+        str::from_utf8(self.as_bytes())
+    }
+
     /// If the contents of the C++ string are valid UTF-8, this function returns
     /// a view as a Cow::Borrowed &amp;str. Otherwise replaces any invalid UTF-8
     /// sequences with the U+FFFD [replacement character] and returns a