Updated Static filter syntax (markdown)

Static-filter-syntax.md

@@ -1,6 +1,6 @@
-uBlock Origin ("uBO") supports Adblock Plus ("ABP") filter syntax, so you can refer to [existing filter syntax documentation from Adblock Plus web site](https://adblockplus.org/en/filters) and ABP's filter [cheatsheet](https://adblockplus.org/filter-cheatsheet). For quick overview you can also check [Introduction to basic filtering syntax](./Introduction-to-basic-filtering-syntax) in this wiki.
+uBlock Origin ("uBO") supports most of EasyList filter syntax, so you can refer to existing filter syntax documentation from [Adblock Plus](https://adblockplus.org/en/filters) and [AdGuard](https://kb.adguard.com/en/general/how-to-create-your-own-ad-filters). For quick overview you can also check [Introduction to basic filtering syntax](./Introduction-to-basic-filtering-syntax) in this wiki.
 
-However uBO does not support some very specific cases, and also adds its own extensions to ABP filter syntax (which at time of writing are not recognized by ABP). Few most surprising cases are documented [here](./Syntax-quirks).
+However uBO does not support some very specific cases, while it also further extends EasyList filter syntax, which extended syntax may also be shared with AdGuard's own extended syntax. Few most surprising cases are documented [here](./Syntax-quirks).
 
 Starting with 1.26.0 (commit [one](https://github.com/gorhill/uBlock/commit/703c525b01aa3fb9dab94d6a9918a0a69c6d18da), [two](https://github.com/gorhill/uBlock/commit/ca80d2826bfd92a3081f20da8ba60138509a183b)), very long filters can be split into multiple lines: append space and backslash character to first line and indent continuation line by four spaces.