FAQ added, fix ccxt#2849, fix ccxt#2845

Author: kroitor

wiki/FAQ.md

@@ -5,7 +5,7 @@
 If your question is formulated in a short manner like the above, we won't help. We don't teach programming. If you're not able to read and understand the [Manual](https://github.com/ccxt/ccxt/wiki) or you can't follow the guides from the [CONTRIBUTING](https://github.com/ccxt/ccxt/blob/master/CONTRIBUTING.md) doc on how to report an issue, we won't help either. Read the Manual. You should not risk money and time without reading the entire Manual very carefully. Namely, when asking a question:
 - Use the search button for duplicates first!
 - **Post your output in verbose mode!** It's written and mentioned everywhere, in the [Troubleshooting](https://github.com/ccxt/ccxt/wiki/Manual#troubleshooting) section, in the [README](https://github.com/ccxt/ccxt/blob/master/README.md) and in many answers to similar questions among [previous issues](https://github.com/ccxt/ccxt/issues) and [pull requests](https://github.com/ccxt/ccxt/pulls).
-- Post your code to reproduce the problem. Make it a complete shor runnable program, don't swallow the lines and make it as compact as you can (5-10 lines of code).
+- Post your code to reproduce the problem. Make it a complete short runnable program, don't swallow the lines and make it as compact as you can (5-10 lines of code). Do not swallow instantation code.
 - Post your version number of ccxt
 - Post your language version number, how do you think we can guess it otherwise?