sam: use default shell command for <, >, | and ! when applicaple

If the shell command is omitted, the last shell command (of any type)
is substituted. The most recently used shell command is stored in a
new register currently named `!`.

1 files changed, 2 insertions, 0 deletions

diff --git a/main.c b/main.c
index d1c346e..5b61022 100644
--- a/main.c
+++ b/main.c
@@ -1265,6 +1265,8 @@ static const char *key2register(Vis *vis, const char *keys, enum VisRegister *re
 		*reg = VIS_REG_SEARCH;
 	else if (keys[0] == ':')
 		*reg = VIS_REG_COMMAND;
+	else if (keys[0] == '!')
+		*reg = VIS_REG_SHELL;
 	return keys+1;
 }