Make clear that any sequence of characters is a valid document.

Closes #266 in a slightly different way than @anko's PR.

1 files changed, 5 insertions, 5 deletions

diff --git a/spec.txt b/spec.txt
index deb73df..c9b147a 100644
--- a/spec.txt
+++ b/spec.txt
@@ -202,17 +202,17 @@ In the examples, the `→` character is used to represent tabs.
 
 ## Characters and lines
 
-The input is a sequence of zero or more [lines](#line).
-
-A [line](@line)
-is a sequence of zero or more [characters](#character) followed by a
-[line ending](#line-ending) or by the end of file.
+Any sequence of [characters](#character) is a valid CommonMark
+document.
 
 A [character](@character) is a unicode code point.
 This spec does not specify an encoding; it thinks of lines as composed
 of characters rather than bytes.  A conforming parser may be limited
 to a certain encoding.
 
+A [line](@line) is a sequence of zero or more [characters](#character)
+followed by a [line ending](#line-ending) or by the end of file.
+
 A [line ending](@line-ending) is, depending on the platform, a
 newline (`U+000A`), carriage return (`U+000D`), or
 carriage return + newline.