demos: fixup, working_copy.png wasn't regenerated properly

The "redacted output" wasn't properly redacted.

Also removed extraneous comment, and added a comment since
the new PNGs are larger than I expected.

demos/helpers.sh

@@ -18,8 +18,6 @@ run_command() {
 
 run_command_output_redacted() {
   echo "\$ $@"
-  # `bash` often resets $COLUMNS, so we also
-  # allow $RUN_COMMAND_COLUMNS
   eval "$@" > /dev/null 2>&1
   echo -e "\033[0;90m... (output redacted) ...\033[0m"
 }

demos/run_scripts.sh

@@ -70,4 +70,11 @@ for script in "$@"; do
             -colors 63 -background black -resize 100%  \
             "$script_base".png \
     || true
+  # TODO/FIXME: The above command doesn't seem to work properly;
+  # the PNG files end up larger than they should be and are RGB
+  # as opposed to expected indexed 63-color. This is caused by
+  # https://github.com/martinvonz/jj/commit/6d573ef6d7a45151495de18b6f4c5063ce39f6bd
+  # and
+  # https://github.com/martinvonz/jj/commit/42dee7d08ce8e362cf9d44f844b25e001b6ac94f
+  # and needs debugging of ImageMagick invocations.
 done