minor: Show `narrow` for UnicodeDecodeError.
minor: Show `narrow` for UnicodeDecodeError.

We have a debugging statement for some obscure errors we get
when narrows have search terms.  We now show all the narrow
operators.  This isn't really to improve debugging; it's more
to make it easier in the next commit to extract a function
that would make search_term have to be passed back in a tuple.
But it shouldn't hurt debugging either.

eeshangarg/zulip,synicalsyntax/zulip,tommyip/zulip,rishig/zulip,tommyip/zulip,jackrzhang/zulip,showell/zulip,tommyip/zulip,brainwane/zulip,kou/zulip,zulip/zulip,kou/zulip,synicalsyntax/zulip,synicalsyntax/zulip,andersk/zulip,jackrzhang/zulip,kou/zulip,hackerkid/zulip,timabbott/zulip,timabbott/zulip,synicalsyntax/zulip,rishig/zulip,brainwane/zulip,rht/zulip,rishig/zulip,rht/zulip,andersk/zulip,andersk/zulip,synicalsyntax/zulip,eeshangarg/zulip,shubhamdhama/zulip,kou/zulip,dhcrzf/zulip,rht/zulip,shubhamdhama/zulip,zulip/zulip,shubhamdhama/zulip,shubhamdhama/zulip,hackerkid/zulip,punchagan/zulip,punchagan/zulip,brainwane/zulip,punchagan/zulip,zulip/zulip,showell/zulip,timabbott/zulip,dhcrzf/zulip,eeshangarg/zulip,andersk/zulip,showell/zulip,showell/zulip,brainwane/zulip,hackerkid/zulip,timabbott/zulip,hackerkid/zulip,dhcrzf/zulip,jackrzhang/zulip,punchagan/zulip,kou/zulip,rishig/zulip,brainwane/zulip,showell/zulip,brainwane/zulip,punchagan/zulip,shubhamdhama/zulip,andersk/zulip,rishig/zulip,timabbott/zulip,eeshangarg/zulip,rht/zulip,synicalsyntax/zulip,kou/zulip,hackerkid/zulip,rht/zulip,tommyip/zulip,hackerkid/zulip,hackerkid/zulip,zulip/zulip,shubhamdhama/zulip,jackrzhang/zulip,rht/zulip,synicalsyntax/zulip,zulip/zulip,dhcrzf/zulip,timabbott/zulip,rishig/zulip,tommyip/zulip,punchagan/zulip,jackrzhang/zulip,jackrzhang/zulip,dhcrzf/zulip,tommyip/zulip,punchagan/zulip,dhcrzf/zulip,zulip/zulip,showell/zulip,showell/zulip,tommyip/zulip,rishig/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,eeshangarg/zulip,dhcrzf/zulip,andersk/zulip,shubhamdhama/zulip,brainwane/zulip,rht/zulip,andersk/zulip,timabbott/zulip,jackrzhang/zulip,eeshangarg/zulip