Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

Longer-term we should improve the pygments to urwid translation logic to
allow these styles to work and an upgrade to later pygments versions,
but for now this allows these themes to continue working as before.

Fixes zulip#1431.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

Longer-term we should improve the pygments to urwid translation logic to
allow these styles to work and an upgrade to later pygments versions,
but for now this allows these themes to continue working as before.

Fixes #1431.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

Longer-term we should improve the pygments to urwid translation logic to
allow these styles to work and an upgrade to later pygments versions,
but for now this allows these themes to continue working as before.

Fixes zulip#1431.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

Longer-term we should improve the pygments to urwid translation logic to
allow these styles to work and an upgrade to later pygments versions,
but for now this allows these themes to continue working as before.

Fixes zulip#1431.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Add method `translate_styles` that manually converts the pygments
`bold italic` style into the urwid-compatible `bold, italics`.

Tests added.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Add method `translate_styles` that manually converts the pygments
`bold italic` style into the urwid-compatible `bold, italics`.

Tests added.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Add method `translate_styles` that manually converts the pygments
`bold italic` style into the urwid-compatible `bold, italics`.

Tests added.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This was temporarily fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Method `translate_styles` manually converts the pygments `bold italic`
style into the urwid-compatible `bold, italics` is there.

Unpin Pygments from ~=2.15.1 to >=2.14.0.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This was temporarily fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Method `translate_styles` manually converts the pygments `bold italic`
style into the urwid-compatible `bold, italics` is there.

Unpin Pygments from ~=2.15.1 to >=2.14.0.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Add method `translate_styles` that manually converts the pygments
`bold italic` style into the urwid-compatible `bold, italics`.

Tests added.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This was temporarily fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Method `translate_styles` manually converts the pygments `bold italic`
style into the urwid-compatible `bold, italics` is there.

Unpin Pygments from ~=2.15.1 to >=2.14.0.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold strong' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

Add method `translate_styles` that manually converts the pygments
`bold italic` style into the urwid-compatible `bold, italics`.

Tests added.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold italic' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

This minimally handles spaces and the shortened `italic` in pygments
styles, sufficient to resolve the current style issue. Note that other
pygments styles in themes that we do not yet use may need additional
translation or adjustment.

Tests added.

Fixes part of zulip#1434.

Pygments 2.16.0 introduced a style to support a combination of bold and
italic styling in pygments/pygments#2444. Both of our gruvbox themes and
the light native theme gain a 'bold italic' style via pygments as a
result, which urwid fails to parse and blocks the application from
loading.

This work would represent a clean fix for zulip#1431, which was temporarily
fixed by pinning pygments at ~=2.15.1 in zulip#1433.

This minimally handles spaces and the shortened `italic` in pygments
styles, sufficient to resolve the current style issue. Note that other
pygments styles in themes that we do not yet use may need additional
translation or adjustment.

Tests added.

Fixes part of zulip#1434.