Looks like link should consume trailing whitespace.

build.rs

@@ -78,9 +78,7 @@ fn is_expect_fail(name: &str) -> Option<&str> {
         "element_container_priority_footnote_definition_greater_block" => Some("Need to implement subscript."),
         "element_container_priority_greater_block_greater_block" => Some("Need to implement subscript."),
         "element_container_priority_section_greater_block" => Some("Need to implement subscript."),
-        "keyword_affiliated_keyword" => Some("Need to implement link."),
         "paragraphs_paragraph_with_backslash_line_breaks" => Some("The text we're getting out of the parse tree is already processed to remove line breaks, so our comparison needs to take that into account."),
-        "text_markup_opening_and_closing" => Some("Need to implement bold and link."),
         _ => None,
     }
 }

toy_language.txt

@@ -1,3 +1,13 @@
-[[https://fizz.buzz/]]
+prologue *goes here* I guess *bold
+text*
 
-[[https://fizz.buzz][super cool website]]
+bold*wont* start *or stop*when there is text outside it
+
+I guess *regular
+
+text*
+
+[[foo][foo *bar]] baz* car
+
+
+*nesting *bold entrances* and* exits