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doc/manual/src/expressions/language-constructs.md

@@ -1,5 +1,7 @@
 # Language Constructs
 
+## Recursive sets
+
 Recursive sets are just normal sets, but the attributes can refer to
 each other. For example,
 
@@ -24,6 +26,8 @@ example,
 
 does not terminate\[1\].
 
+## Let-expressions
+
 A let-expression allows you to define local variables for an expression.
 For instance,
 
@@ -34,6 +38,8 @@ For instance,
 
 evaluates to `"foobar"`.
 
+## Inheriting attributes
+
 When defining a set or in a let-expression it is often convenient to
 copy variables from the surrounding lexical scope (e.g., when you want
 to propagate attributes). This can be shortened using the `inherit`
@@ -95,6 +101,8 @@ is equivalent to
 when used while defining local variables in a let-expression or while
 defining a set.
 
+## Functions
+
 Functions have the following form:
 
     pattern: body
@@ -187,6 +195,8 @@ you can bind them to an attribute, e.g.,
     let concat = { x, y }: x + y;
     in concat { x = "foo"; y = "bar"; }
 
+## Conditionals
+
 Conditionals look like this:
 
     if e1 then e2 else e3
@@ -194,6 +204,8 @@ Conditionals look like this:
 where e1 is an expression that should evaluate to a Boolean value
 (`true` or `false`).
 
+## Assertions
+
 Assertions are generally used to check that certain requirements on or
 between features and dependencies hold. They look like this:
 
@@ -257,6 +269,8 @@ The points of interest are:
     non-`null` value was passed. This prevents an unnecessary rebuild of
     Subversion if OpenSSL changes.
 
+## With-expressions
+
 A *with-expression*,
 
     with e1; e2
@@ -285,6 +299,8 @@ establishes the same scope as
 
     let a = 1; in let a = 2; in let a = 3; in let a = 4; in ...
 
+## Comments
+
 Comments can be single-line, started with a `#` character, or
 inline/multi-line, enclosed within `/*
 ... */`.

doc/manual/src/expressions/language-values.md

@@ -1,5 +1,7 @@
 # Values
 
+## Simple Values
+
 Nix has the following basic data types:
 
   - *Strings* can be written in three ways.
@@ -127,6 +129,8 @@ Nix has the following basic data types:
 
   - The null value, denoted as `null`.
 
+## Lists
+
 Lists are formed by enclosing a whitespace-separated list of values
 between square brackets. For example,
 
@@ -143,6 +147,8 @@ function and the fifth being a set.
 
 Note that lists are only lazy in values, and they are strict in length.
 
+## Sets
+
 Sets are really the core of the language, since ultimately the Nix
 language is all about creating derivations, which are really just sets
 of attributes to be passed to build scripts.