Weird manpage output

[sholladay]

• I am on the latest Hyper.app version
• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: macOS 10.13.1
• Hyper.app version: 1.4.8
• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/sholladay/85bddc67eb9c7071f9006d62ce166953
• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere): N/A
• The issue is reproducible in vanilla Hyper.app: I believe so, but not sure. My config is very close to default.

Issue

Running man node outputs two weird lines at the beginning that do not appear when I run the same command in Terminal.app.

`R' is a string (producing the registered sign), not a macro.
`R' is a string (producing the registered sign), not a macro.
NODE(1)                                         Node.js                                         NODE(1)

NAME
       node - Server-side JavaScript runtime

SYNOPSIS
...

The weird part is this:

`R' is a string (producing the registered sign), not a macro.
`R' is a string (producing the registered sign), not a macro.

[silverwind]

This is likely a issue with node's manpage, see nodejs/node#18434

[sholladay]

Huh okay, interesting. Figured it was Hyper cause it worked fine through Terminal.app for me (using the same shell, etc).

I think we should keep this open until I have a chance to test with that patch. But it looks promising!

[silverwind]

In your case, I suspect that Terminal.app invokes a different shell environment which maybe has a different manpager set up. try comparing the output of env in both terminals.

[Alhadis]

When man runs and finds a manual page to display, it passes it through troff to generate SGR-encoded output fit for terminal display. It calls troff with preconfigured command-line switches, one of which is to suppress all error messages (specifically, -Wall). See the options section in troff(1) and
check what's been set in /etc/man.conf:

TROFF         /usr/local/bin/groff -Tps     -mandoc
NROFF         /usr/local/bin/groff -Tutf8   -mandoc  -Wall

[silverwind]

@Alhadis Thanks for the pointer. I just compared the defaults in macOS and Linux and groff emits the warnings in both cases, but in Linux it appears that the man utility supresses printing them when the output is a pager. I can see them via man node > /dev/null. It appears the man utility on macOS does not have that functionality.