Add docs for h.wrapText in readme.md

Author: wooorm

index.js

@@ -20,8 +20,8 @@ function toMdast(tree, options) {
 
   h.handlers = xtend(handlers, settings.handlers || {})
   h.augment = augment
-  h.document = settings.document
 
+  h.document = settings.document
   h.checked = settings.checked || '[x]'
   h.unchecked = settings.unchecked || '[ ]'
   h.quotes = settings.quotes || ['"']
@@ -53,6 +53,7 @@ function toMdast(tree, options) {
     return augment(node, result)
   }
 
+  // To do: inline in a future major.
   // `right` is the finalized mdast node, created from `left`, a hast node.
   function augment(left, right) {
     if (left.position) {

readme.md

@@ -72,6 +72,12 @@ Object mapping tag names or [*types*][type] to functions handling those
 [*elements*][element] or [*nodes*][hast-node].
 See [`handlers/`][handlers] for examples.
 
+In a handler, you have access to `h`, which should be used to create mdast nodes
+from hast nodes.
+On `h`, there are fields that may be of interest.
+Most interesting of them is `h.wrapText`, which is `true` if the mdast content
+can include newlines, and `false` if not (such as in headings or table cells).
+
 ###### `options.document`
 
 Whether the given [*tree*][tree] is a complete document.