[devhelp] Book: improve doc of dh_book_get_language()

[Sébastien Wilmet <swilmet src gnome org>]

commit 6fa650831c49901dfc9f6d711b0b7e3a59ed067e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Dec 29 20:41:44 2017 +0100

    Book: improve doc of dh_book_get_language()

 src/dh-book.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/dh-book.c b/src/dh-book.c
index 0513581..7db76e8 100644
--- a/src/dh-book.c
+++ b/src/dh-book.c
@@ -443,7 +443,7 @@ dh_book_get_title (DhBook *book)
  * dh_book_get_language:
  * @book: a #DhBook.
  *
- * Returns: the book language.
+ * Returns: the programming language used in @book.
  */
 const gchar *
 dh_book_get_language (DhBook *book)