run go fmt on floats_test

I knew I was forgetting something…
Merge pull request #9 from gonum/improve-test-coverage

Improve test coverage
remove extra blank line

don’t know how it snuck in
Merge pull request #10 from gonum/improve-docs-and-unify-vars

Improve docs, and make the variable names consistent
undo non-improvement to Max, Min, and Nearest

Turns out the doubled comparison is not a significant decrease in
performance compared to any alternative I could come up with that
avoids it.  Reverting.
Add missing periods to docs

Two public functions had missing periods at the end of sentences.
Fixed.
Merge pull request #11 from gonum/minor-code-improvements

Fix minor documentation and code issues.
Put returns back into [Op]To functions

Functions which always result in the same dot slice should return
slices, as agreed during discussion in gonum-dev.

I also added tests to make sure that the returned slices were the same
as the mutated slices.  Even though the coverage was reporting 100%,
the tests were not covering 100% of the returned values.
go fmt the code

what it says on the tin
Add returned slices for AddScaledTo and Cum*

Added missing returned slices for AddScaledTo, CumSum, and CumProd.

Also added tests for the returned slices.
Merge pull request #12 from gonum/simplify-interfaces-retry

Simplify interfaces, as outlined in https://groups.google.com/forum/#!topic/gonum-dev/kOSNjAYGpPc
Added Same function for comparing if floats slices contain identical elemens
Made code path for Same shorter
removed unnecessary parens
Merge pull request #15 from gonum/addsame

Added Same function for comparing if floats slices contain identical ele...
Added Within function.

Within is useful for finding the bin of a datapoint, for example when making a histogram or otherwise trying to find similar points. This commit adds the function and tests.
Merge pull request #16 from gonum/addwithin

Added Within function. This function puts a datapoint within bounds specified by the user.
Fixed indentation of special cases for within
Fixed behavior of within to remove special case
Fixed NearestInSpan to return -1 when out of bounds and panic with bad bounds. Fixed tests to be table driven.