Parentheses examples makes more sense

In the old example, parentheses had no impact because multiplication should have precedence over addition.

Thanks to @inseo for the suggestion.
Merge pull request #770 from kaelig/patch-1

Parentheses example make more sense
Use sass_warn for @debug.

Closes #775
Escape "*/" in full exceptions.

Closes #778
Preserve the bang in /*! comments.
Merge remote-tracking branch 'origin/stable' into stable
Update INDENTED_SYNTAX.md

fix a typo
Merge pull request #802 from lkdjiin/patch-1

Update INDENTED_SYNTAX.md
Fix an @extend trimming bug.

Closes #788.
Merge remote-tracking branch 'origin/stable' into stable
add a code tag for UTF-8, more consistency
Merge pull request #813 from JuanitoFatas/add-a-code-tag-for-doc

add a code tag for UTF-8, more consistency
Update MIT-LICENSE copyright date
Merge pull request #823 from andrewpthorp/stable

Update MIT-LICENSE copyright date
Clean up the Sass function documentation.

This changes all references to parameters to be $-prefixed, adds
parameter and return type documentation for all parameters, and adds
parameter names to most assert_type calls. It also normalizes the
formatting and phrasing across all docstrings.

Hopefully now that this is more consistently formatted, it'll be
easier to follow the formatting when creating new functions.
Merge remote-tracking branch 'origin/stable' into stable
Fix --unix-newlines/--in-place not working on Windows.

Closes #730.
Bump VERSION to 3.2.10.
Fix typo in Sass variable arguments documentation.
Added gem version badge to README