Closes rust-lang#19097

coherence. Skolemized parameters wind up preventing unification.
Surprised we had no test for this! Fixes rust-lang#24241.

A brief introduction to each type, with pointers to the primitive pages
for more info.

Closes rust-lang#20772
Closes rust-lang#20939
Closes rust-lang#21950
Closes rust-lang#22034

"highlight end" and instead add a variant to `RenderSpan`

columns within a line, not just the line numbers. Also try to clarify
and use the term `line_index` when 0-based.

of text (perhaps obtained by span_snippet) and then splice that edited
form back into the original file in the form of a suggestion.

from the current fn. Employ the new `span_suggestion` to show how you
can use `move`.

This is very confusing now that these are inherent methods.

…c to be less confusing. Since 0 is the smallest number possible for usize, it doesn't make sense to mention it if it's already included, and it should be more clear that the length of the vector is a valid index with the new wording.

https://botbot.me/mozilla/rust-internals/2015-04-10/?msg=36316959&page=6

Docs meant that Option is returned though the function returns Result.

Same with integers — docs meant that Option is returned though the function returns Result.

Fill out blank section headers. Copy edit the entire first section.

…eklabnik

rust-lang#24004

Something like this?

Closes rust-lang#19097

…labnik

Now that the new TOC has landed, I've started doing an editing pass to get the old content into the right shape. I felt this introduction was significant enough to send as its own PR, though, as it's the introduction.

It's possible that we may just want to replace 'the intro' with this directly, but this PR doesn't do that.

…-message, r=brson

Example showing sample inputs, old message, new message:

https://gist.github.com/nikomatsakis/11126784ac678b7eb6ba

Also adds infrastructure for reporting suggestions "in situ" and does some (minor) cleanups to `CodeMap`.

r? @brson

…labnik

Fill out blank section headers. Copy edit the entire first section.

…failure, r=pnkfelix

Don't use skolemized parameters but rather fresh variables in coherence. Skolemized parameters wind up preventing unification. Surprised we had no test for this! Fixes rust-lang#24241.

r? @pnkfelix

…gs, r=huonw

keeping on with the edits

…=alexcrichton

A brief introduction to each type, with pointers to the primitive pages
for more info.

Closes rust-lang#20772
Closes rust-lang#20939
Closes rust-lang#21950
Closes rust-lang#22034

…tsakis

This is very confusing now that these are inherent methods.

…labnik

...to be less confusing. Since 0 is the smallest number possible for usize, it doesn't make sense to mention it if it's already included, and it should be more clear that the length of the vector is a valid index with the new wording.

r? @steveklabnik

https://botbot.me/mozilla/rust-internals/2015-04-10/?msg=36316959&page=6

From [here](http://doc.rust-lang.org/nightly/std/primitive.i8.html):

> `fn rotate_right(self, n: u32) -> i8`
> Shifts the bits to the right by a specified __amount amount__, n, wrapping the truncated bits to the beginning of the resulting integer.

Fixes 'fn from_str_radix' documentation where docs meant that Option is returned, though the function returns Result.