docs: fix filter-branch subdir example for exotic repo names

diff --git a/xdiff-interface.c b/xdiff-interface.c
index e1e054e4d982de30d8a9c8c4109c6d62448f62a9..164581f87f49935f0d1b1885420960a4d11dea56 100644 (file)
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -212,8 +212,10 @@ int read_mmfile(mmfile_t *ptr, const char *filename)
                return error("Could not open %s", filename);
        sz = xsize_t(st.st_size);
        ptr->ptr = xmalloc(sz ? sz : 1);
-       if (sz && fread(ptr->ptr, sz, 1, f) != 1)
+       if (sz && fread(ptr->ptr, sz, 1, f) != 1) {
+               fclose(f);
                return error("Could not read %s", filename);
+       }
        fclose(f);
        ptr->size = sz;
        return 0;