manual: header links are wrong

[steveklabnik]

links to http://doc.rust-lang.org/rust.html#lvalues,-rvalues-and-temporaries within the text are wrong, because there's a comma in the name now.

Making a note of this because I don't have time to fix it immediately.

[mdinger]

Untested but should fix it.
mdinger@4afe310

Did a text search over the entire tree for #lvalues-rvalues-and-temporaries. Should be all the links.

[mdinger]

Fix just merged. Probably safe to close this.

[steveklabnik]

Thank you so much for the fix!

[mdinger]

Glad to help.