sha1-file.c: correct $GITDIR to $GIT_DIR in a comment
Fix single misspelling of $GITDIR to correct $GIT_DIR in a comment.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac..1c39b2e 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -583,7 +583,7 @@ void add_to_alternates_memory(const char *reference)
/*
* Compute the exact path an alternate is at and returns it. In case of
* error NULL is returned and the human readable error is added to `err`
- * `path` may be relative and should point to $GITDIR.
+ * `path` may be relative and should point to $GIT_DIR.
* `err` must not be null.
*/
char *compute_alternate_path(const char *path, struct strbuf *err)
