Document that strikethrough can also use a single tilde.

ehuss · ehuss · commit 4f15a3f85c81 · 2023-06-29T12:27:06.000-07:00
diff --git a/guide/src/format/markdown.md b/guide/src/format/markdown.md
@@ -124,7 +124,7 @@ mdBook has several extensions beyond the standard CommonMark specification.
 ### Strikethrough
 
 Text may be rendered with a horizontal line through the center by wrapping the
-text with two tilde characters on each side:
+text with one or two tilde characters on each side:
 
 ```text
 An example of ~~strikethrough text~~.
diff --git a/test_book/src/individual/strikethrough.md b/test_book/src/individual/strikethrough.md
@@ -1,5 +1,7 @@
 # Strikethrough
 
+~Single strike~
+
 ~~This is Striked~~
 
 ~~This is **strong**, _italic_ , **_both_** and striked~~
