Misc style improvements

- Upgrades / downgrades some section header sizes to clearer positions
- Mild reorganization for clearer content flow
- Capitalization typo fixes

Serves https://github.com/bazelbuild/bazel/issues/10794

Closes #10820.

PiperOrigin-RevId: 296229327
diff --git a/site/docs/configurable-attributes.md b/site/docs/configurable-attributes.md
index 2c74ca8..4ecf439 100644
--- a/site/docs/configurable-attributes.md
+++ b/site/docs/configurable-attributes.md
@@ -90,6 +90,7 @@
     <td><code>[":generic_lib"]</code></td>
   </tr>
 </table>
+
 `select()` serves as a placeholder for a value that will be chosen based on
 *configuration conditions*. These conditions are labels that refer to
 [`config_setting`](be/general.html#config_setting) targets. By using `select()`
@@ -733,7 +734,7 @@
 
 ## FAQ
 
-## <a name="macros-select"></a>Why doesn't select() work in macros?
+### <a name="macros-select"></a>Why doesn't select() work in macros?
 select() *does* work in rules! See [Rules compatibility](#rules) for
 details.
 
@@ -844,7 +845,7 @@
 DEBUG: /myworkspace/myproject/defs.bzl:15:3: My name is sad_macro_less_sad with custom message: FIRST STRING.
 ```
 
-## <a name="boolean-select"></a>Why does select() always return true?
+### <a name="boolean-select"></a>Why does select() always return true?
 Because *macros* (but not rules) by definition
 [can't evaluate select(s)](#macros-select), any attempt to do so
 usually produces an error:
@@ -888,7 +889,7 @@
 [Pythonic](https://docs.python.org/release/2.5.2/lib/truth.html) design
 standards, all objects aside from a very small number of exceptions
 automatically return true.
-## <a name="inspectable-select"></a>Can I read select() like a dict?
+### <a name="inspectable-select"></a>Can I read select() like a dict?
 Fine. Macros [can't](#macros-select) evaluate select(s) because
 macros are evaluated before Bazel knows what the command line flags are.
 
@@ -946,7 +947,7 @@
     )
 ```
 
-## <a name="bind-select"></a>Why doesn't select() work with bind()?
+### <a name="bind-select"></a>Why doesn't select() work with bind()?
 
 Because [`bind()`](be/workspace.html#bind) is a WORKSPACE rule, not a BUILD rule.