render: added begin_content field.

This is like `begin_line` except that it doesn't trigger
production of the prefix.  So it can be set after an initial
prefix (say `> `) is printed by the renderer, and consulted
in determining whether to escape content that has a special
meaning at the beginning of a line.

Used in the commonmark renderer.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/render.h b/src/render.h
index 9ab347b..479936a 100644
--- a/src/render.h
+++ b/src/render.h
@@ -19,6 +19,7 @@ struct cmark_renderer {
   int need_cr;
   bufsize_t last_breakable;
   bool begin_line;
+  bool begin_content;
   bool no_wrap;
   bool in_tight_list_item;
   void (*outc)(struct cmark_renderer *, cmark_escaping, int32_t, unsigned char);