reachable.hon commit t1004-read-tree-m-u-wf.sh: use the $( ... ) construct for command substitution (77317c0)
   1#ifndef REACHEABLE_H
   2#define REACHEABLE_H
   3
   4struct progress;
   5extern void mark_reachable_objects(struct rev_info *revs, int mark_reflog, struct progress *);
   6
   7#endif