t/t5900-repo-selection.sh: use the $( ... ) construct for command substitution

diff --git a/run-command.h b/run-command.h
index f315868a03b0969f5ad111510df1c17c0c32b702..12bb26c2a6155750203babfec47b08e8bde0ad27 100644 (file)
--- a/run-command.h
+++ b/run-command.h
@@ -120,5 +120,6 @@ struct async {
 
 int start_async(struct async *async);
 int finish_async(struct async *async);
+int in_async(void);
 
 #endif