the flattening

not to be confused with the Minecraft technical update

I'm moving about the pages to be have a more flat, less nested structure.
I feel like that'll improve URLs a lot, making them more readable than ever.

over the years I've learned that flatter is better, and that tagging is generally a much more effective way of organising things.
this doesn't get rid of categories entirely, as I think having the category makes the URL much a bit more readable in the end.
my current vision does include a concept of "major categories" either way.

content/programming/try-is-not-the-only-option.tree

@@ -0,0 +1,20 @@
+%% title = "`?` is not the only option"
+
+% id = "01J4J6400Q4MWF2QPGX3P9Q2WQ"
+- if there's one thing I learned from Go...
+
+```rust
+let mut list = WalkList::new(args);
+
+let condition = list.expect_arg(c, src, "missing `if` condition");
+let if_true = list.expect_arg(c, src, "missing `if` true branch");
+let if_false = list.expect_arg(c, src, "missing `if` false branch");
+list.expect_nil(c, src, "extra arguments after `if` false branch");
+
+if !list.ok {
+    return Ok(());
+}
+```
+
+...it's that `?` is not the only option.
+