* SASS. @each. Replace stub
Added 1x guide/example, 1x problem, and 1x solution.
* Removed problem from solution
Removed the problem from solution.
* Fix languages and made formatting changes
* Added SASS solution and output CSS
* Fixed typo, added code formatting
The example code outputs for "start to end" and "start through end" were swapped. "1 to 3" does not include the end number, so should output "1 2", while "1 through 3" includes the end number, so should output "1 2 3"
* Added SASS solution and output CSS
* Added SASS solution
* Updated solution to full solution
Now includes all seed code, plus the changes needed to pass the tests, per @thecodingaviator [suggestion](https://github.com/freeCodeCamp/freeCodeCamp/pull/34792#pullrequestreview-210097979).
* Updated solution to full solution
Now includes all seed code, plus the changes needed to pass the tests, per @thecodingaviator suggestion https://github.com/freeCodeCamp/freeCodeCamp/pull/34792#pullrequestreview-210097979.
* Fixed Markdown syntax
Minor edit
* Updated solution to full solution
Now includes all seed code, plus the changes needed to pass the tests, per @thecodingaviator suggestion https://github.com/freeCodeCamp/freeCodeCamp/pull/34792#discussion_r263731937.
* Guide: added solution @while sass
Added proper Solution to the Guide for the problem Apply a Style Until a Condition is Met with @while, this is no longer a stub
* fix: used 2-space indentation and removed verbiage
* Removed images with broken links
* Added back the images previously removed.
* Translate challenge subtitles and example challenge text to Spanish
* Corrected errors in syntax and punctuation
* Multiple corrections of it/s to its plus other grammar corrections
* Correction and added paragraph to CSS Flex article
* Corrected my own typo
* Corrected capitalization, American spellings and typos
