Stop using tabs, update clang-format config.
diff --git a/lib/zip_get_num_entries.c b/lib/zip_get_num_entries.c
index 410d26e..3dc38e3 100644
--- a/lib/zip_get_num_entries.c
+++ b/lib/zip_get_num_entries.c
@@ -40,13 +40,13 @@
     zip_uint64_t n;
 
     if (za == NULL)
-	return -1;
+        return -1;
 
     if (flags & ZIP_FL_UNCHANGED) {
-	n = za->nentry;
-	while (n > 0 && za->entry[n - 1].orig == NULL)
-	    --n;
-	return (zip_int64_t)n;
+        n = za->nentry;
+        while (n > 0 && za->entry[n - 1].orig == NULL)
+            --n;
+        return (zip_int64_t)n;
     }
     return (zip_int64_t)za->nentry;
 }