Rename some test scripts and describe the naming convention

diff --git a/diff.h b/diff.h
index 8f269b27721c3025a24c89bf16f32a6490397180..0b76cc42816e1f7804df6f313f24ce9be491b6e8 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -20,15 +20,12 @@ extern void diff_unmerge(const char *path);
 /* These are for diff-tree-helper */
 
 struct diff_spec {
-       union {
-               const char *name;       /* path on the filesystem */
-               unsigned char sha1[20]; /* blob object ID */
-       } u;
+       unsigned char blob_sha1[20];
        unsigned short mode;     /* file mode */
-       unsigned sha1_valid : 1; /* if true, use u.sha1 and trust mode.
-                                 * (however with a NULL SHA1, read them
-                                 * from the file!).
-                                 * if false, use u.name and read mode from
+       unsigned sha1_valid : 1; /* if true, use blob_sha1 and trust mode;
+                                 * however with a NULL SHA1, read them
+                                 * from the file system.
+                                 * if false, use the name and read mode from
                                  * the filesystem.
                                  */
        unsigned file_valid : 1; /* if false the file does not even exist */