[PATCH v2 3/3] am -i: fix "v"iew

The 'v'iew subcommand of the interactive mode of "git am -i" was
broken by the rewrite to C we did at around 2.6.0 timeframe at
7ff26832 (builtin-am: implement -i/--interactive, 2015-08-04); we
used to spawn the pager via the shell, accepting things like

	PAGER='less -S'

in the environment, but the rewrite forgot and tried to directly
spawn a command whose name is the entire string.

The previous refactoring of the new helper function makes it easier
for us to do the right thing.

Signed-off-by: Junio C Hamano <redacted>
---
 * Essentially the same as v1, modulo adjustment for the change in 2/3

 builtin/am.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/am.c b/builtin/am.c
index 1399c8d..56cf26e 100644
--- a/builtin/am.c
+++ b/builtin/am.c

@@ -1740,7 +1740,7 @@ static int do_interactive(struct am_state *state)
 
 			if (!pager)
 				pager = "cat";
-			argv_array_push(&cp.args, pager);
+			prepare_pager_args(&cp, pager);
 			argv_array_push(&cp.args, am_path(state, "patch"));
 			run_command(&cp);
 		}

-- 
2.7.1-489-g20b2cbe