Remove strike attribute
The strike attribute is deprecated and removed from standards
(https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/strike).
This replaces it with the built-in markdown strikethrough.
diff --git a/src/influences.md b/src/influences.md
index 3aa812a..d056c79 100644
--- a/src/influences.md
+++ b/src/influences.md
@@ -11,12 +11,12 @@
* ML Kit, Cyclone: region based memory management
* Haskell (GHC): typeclasses, type families
* Newsqueak, Alef, Limbo: channels, concurrency
-* Erlang: message passing, thread failure, <strike>linked thread failure</strike>,
- <strike>lightweight concurrency</strike>
+* Erlang: message passing, thread failure, ~~linked thread failure~~,
+ ~~lightweight concurrency~~
* Swift: optional bindings
* Scheme: hygienic macros
* C#: attributes
-* Ruby: closure syntax, <strike>block syntax</strike>
-* NIL, Hermes: <strike>typestate</strike>
+* Ruby: closure syntax, ~~block syntax~~
+* NIL, Hermes: ~~typestate~~
* [Unicode Annex #31](http://www.unicode.org/reports/tr31/): identifier and
pattern syntax
