Remove noisy output from tests

"ui_out -until-grep" invocations used to redirect the output from
grep, usually to /dev/null.  Looks like the intention of 60fcc3443
(Change ui_out -until-grep to check for equality the next argument,
2024-11-02) was that grep no longer needs to print output, since we
can assert instead which is mildly better.

Unfortunately there are two places where -until-grep might not be
powerful enough, which is why we capture the output and check it
in the test script. For one of them we can use -until-grep with a
small change.  Not yet sure about the other one. Let's try to use
eval instead, so we can silence the output.

I realize -until-eval is not great (the nested quoting is ugly)
but I guess it's better than the status quo.

Alternatively, we could print output only if the [expected] argument
is not given, and add >/dev/null to the other invocations.

test/run

@@ -198,11 +198,11 @@ ui_out() {
       [ "$event" = "$expected" ] && break
     done
     ;;
-  -until-grep)
+  -until-eval | -until-grep)
     pattern=$1
     shift
     while read -r event <&4; do
-      if printf %s "$event" | grep "$pattern"; then
+      if printf %s "$event" | "${arg#-until-}" "$pattern" >/dev/null; then
         if [ $# -ne 0 ]; then
             assert_eq "$1" "$event"
             shift

test/tools/git/blame-in-diff/script

@@ -3,7 +3,7 @@ ui_out -until '{ "jsonrpc": "2.0", "method": "refresh", "params": [false] }'
 # We've jumped to the new version of line 2. Move to the old version so we
 # can annotate the old file.
 ui_in '{ "jsonrpc": "2.0", "method": "keys", "params": [ "k:git blame<ret>" ] }'
-while ui_out -until-grep '"draw_status"' | grep '\[fifo\]'; do :; done > /dev/null
+ui_out -until-eval 'grep "draw_status" | grep -v "\[fifo\]"'
 
 # We should have jumped to the old version of line 2, assert on kak_selection.
 ui_in '{ "jsonrpc": "2.0", "method": "keys", "params": [ "x" ] }'

test/tools/git/blame-jump-message/script

@@ -1,8 +1,3 @@
-while true; do
-    ui_out -until-grep draw_status | grep -v '\[fifo\]' >/dev/null && break
-done
-actual_draw_status=$(ui_out -until-grep draw_status)
-
 expected_subject=$(cat <<'EOF'
 2017-07-14 A U Thor "Don't break on single quotes or unbalanced {"
 EOF
@@ -10,5 +5,5 @@ EOF
 expected_subject_json=\"$(printf '%s' "$expected_subject" | sed 's/"/\\"/g')\"
 expected_draw_status='{ "jsonrpc": "2.0", "method": "draw_status", "params": [[{ "face": { "fg": "black", "bg": "yellow", "underline": "default", "attributes": [] }, "contents": '"$expected_subject_json"' }], [{ "face": { "fg": "default", "bg": "default", "underline": "default", "attributes": [] }, "contents": "*git* 13:2 " }, { "face": { "fg": "black", "bg": "yellow", "underline": "default", "attributes": [] }, "contents": "[scratch]" }, { "face": { "fg": "default", "bg": "default", "underline": "default", "attributes": [] }, "contents": " " }, { "face": { "fg": "blue", "bg": "default", "underline": "default", "attributes": [] }, "contents": "1 sel" }, { "face": { "fg": "default", "bg": "default", "underline": "default", "attributes": [] }, "contents": " - client0@[kak-tests]" }], { "fg": "cyan", "bg": "default", "underline": "default", "attributes": [] }] }'
 
-assert_eq "$expected_draw_status" "$actual_draw_status"
+ui_out -until-grep 'draw_status.*single quotes' "$expected_draw_status"
 ui_out -ignore 2