Samples for seq module (#12133)
Samples for seq module (#12133)

* All pairs

* append

* Average

* averageBy

* Reordering

* Cache

* Cast

* Fixed types in xml comments

* Unused open removed

* Cleanup

* Comparewith

* Refined seq

* delay

* Addressing comments

* Addressing comments

* More examples normalized

* Addressed all comments

* Done with comments

* Added concat example

* Distinct and distinct by.

* Update seq.fsi

Co-authored-by: Don Syme <b77950cdf1a232368f529545a433dad696edb2c3@users.noreply.github.com>
dsyme/fsharp,dsyme/fsharp,dsyme/fsharp,dsyme/fsharp,dsyme/fsharp,dsyme/fsharp,dsyme/fsharp