[PATCH 2/3] range-diff: mark pointers as const

[Denton Liu <liu.denton@gmail.com>]

The contents pointed to by `diffopt` and `other_arg` should not be
modified. Mark these as `const` to indicate this.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
---
 range-diff.c | 6 +++---
 range-diff.h | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/range-diff.c b/range-diff.c
index f56b4012a2..f745567cf6 100644
--- a/range-diff.c
+++ b/range-diff.c
@@ -41,7 +41,7 @@ static size_t find_end_of_line(char *buffer, unsigned long size)
  * as struct object_id (will need to be free()d).
  */
 static int read_patches(const char *range, struct string_list *list,
-			struct argv_array *other_arg)
+			const struct argv_array *other_arg)
 {
 	struct child_process cp = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT, contents = STRBUF_INIT;
@@ -506,8 +506,8 @@ static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data)
 
 int show_range_diff(const char *range1, const char *range2,
 		    int creation_factor, int dual_color,
-		    struct diff_options *diffopt,
-		    struct argv_array *other_arg)
+		    const struct diff_options *diffopt,
+		    const struct argv_array *other_arg)
 {
 	int res = 0;
 
diff --git a/range-diff.h b/range-diff.h
index 7d918ab9ed..381d52f4d3 100644
--- a/range-diff.h
+++ b/range-diff.h
@@ -13,7 +13,7 @@
  */
 int show_range_diff(const char *range1, const char *range2,
 		    int creation_factor, int dual_color,
-		    struct diff_options *diffopt,
-		    struct argv_array *other_arg);
+		    const struct diff_options *diffopt,
+		    const struct argv_array *other_arg);
 
 #endif
-- 
2.24.0.612.g9b7bad38f5