text: make text_snapshot return whether it succeeded

Currently this can't fail, but one can imagine implementations which do.

1 files changed, 1 insertions, 1 deletions

diff --git a/text.h b/text.h
index f5a6993..6027e62 100644
--- a/text.h
+++ b/text.h
@@ -166,7 +166,7 @@ bool text_appendf(Text*, const char *format, ...) __attribute__((format(printf,
 /**
  * Create a text snapshot, that is a vertice in the history graph.
  */
-void text_snapshot(Text*);
+bool text_snapshot(Text*);
 /**
  * Revert to previous snapshot along the main branch.
  * @rst