doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/sort.h b/include/sort.h
index 0c6b588..76483cf 100644
--- a/include/sort.h
+++ b/include/sort.h
@@ -27,7 +27,7 @@
  *
  * @s1: First string to compare
  * @s2: Second string to compare
- * @return comparison value (less than, equal to, or greater than 0)
+ * Return: comparison value (less than, equal to, or greater than 0)
  */
 int strcmp_compar(const void *s1, const void *s2);