Make use of Servo's border-spacing in Stylo

[wafflespeanut]

---

• ./mach build -d does not report any errors
• ./mach test-tidy does not report any errors

• These changes have been tested manually

r? @Manishearth

---

This change is

[highfive]

Heads up! This PR modifies the following files:

• @bholley: components/style/properties/gecko.mako.rs, components/style/properties/longhand/inherited_table.mako.rs

[highfive]

Warning

• These commits modify style code, but no tests are modified. Please consider adding a test!

[Manishearth]

@bors-servo r+

[bors-servo]

📌 Commit 2999581 has been approved by Manishearth

[bors-servo]

⌛ Testing commit 2999581 with merge 2780011...

[bors-servo]

💔 Test failed - linux-rel

[jdm]

@bors-servo: retry

• #13509

[bors-servo]

⌛ Testing commit 2999581 with merge abe1717...

[bors-servo]

💔 Test failed - linux-rel

[KiChjang]

@bors-servo retry

• #12654

[bors-servo]

⌛ Testing commit 2999581 with merge 758d563...

[bors-servo]

💔 Test failed - linux-rel

[wafflespeanut]

@bors-servo retry #13492

[bors-servo]

⌛ Testing commit 2999581 with merge 30127ba...

[bors-servo]

💔 Test failed - linux-dev

[wafflespeanut]

Wat. (cc @Manishearth)

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: run with `RUST_BACKTRACE=1` for a backtrace

thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: FromUtf8Error { bytes: [0, 0, 0, 0, 80, 229, 116, 100], error: Utf8Error { valid_up_to: 5 } }', ../src/libcore/result.rs:799
stack backtrace:
   1:     0x7fa03a6b2b12 - std::sys::backtrace::tracing::imp::write::h4b09e6e8c01db097
   2:     0x7fa03a6cbead - std::panicking::default_hook::{{closure}}::h1d3243f546573ff4
   3:     0x7fa03a6c0f9e - std::panicking::default_hook::h96c288d728df3ebf
   4:     0x7fa03a6c1688 - std::panicking::rust_panic_with_hook::hb1322e5f2588b4db
   5:     0x7fa03a6c1522 - std::panicking::begin_panic::hfbeda5aad583dc32
   6:     0x7fa03a6c1460 - std::panicking::begin_panic_fmt::h4fe9fb9d5109c4bf
   7:     0x7fa03a6c13e1 - rust_begin_unwind
   8:     0x7fa03a71c82c - core::panicking::panic_fmt::h4395919ece15c671
   9:     0x7fa0391a24ec - core::result::unwrap_failed::h5b769ce1a31159ca
  10:     0x7fa03929782c - rustc_metadata::loader::get_metadata_section::he6ca41a4f59a14be
  11:     0x7fa039294aeb - rustc_metadata::loader::Context::extract_one::h486b361d1c05bc7d
  12:     0x7fa0392921d5 - rustc_metadata::loader::Context::find_library_crate::h1b17d74a9a885f1a
  13:     0x7fa03927cbc9 - rustc_metadata::creader::CrateReader::load::h03b51b732e53ef57
  14:     0x7fa03927bff6 - rustc_metadata::creader::CrateReader::resolve_crate::h28377323c8e6b2d4
  15:     0x7fa0392a3077 - rustc_metadata::creader::CrateReader::resolve_crate_deps::{{closure}}::ha8b611a19f65d09d
  16:     0x7fa039199118 - <std::collections::hash::map::HashMap<K, V, S> as core::iter::traits::FromIterator<(K, V)>>::from_iter::hc901eff2585c101a
  17:     0x7fa03927a03b - rustc_metadata::creader::CrateReader::register_crate::h59c678713636e5c2
  18:     0x7fa039280e6c - rustc_metadata::creader::CrateReader::read_macros::h43d8594e6a862f38
  19:     0x7fa03929857c - <rustc_metadata::macro_import::MacroLoader<'a> as rustc::middle::cstore::MacroLoader>::load_crate::h6fa2255f1cfc3b33
  20:     0x7fa038ccbcbb - rustc_resolve::macros::<impl syntax::ext::base::Resolver for rustc_resolve::Resolver<'a>>::load_crate::hd78c506a5dcdac99
  21:     0x7fa0336095ac - <syntax::ext::expand::InvocationCollector<'a, 'b> as syntax::fold::Folder>::fold_item::h0fe28be5da841c1a
  22:     0x7fa0334ed54a - syntax::fold::noop_fold_mod::hfc874acebc47b78f
  23:     0x7fa0334dfb0c - syntax::fold::noop_fold_item_kind::h585a43546386a7ee
  24:     0x7fa0334f1633 - syntax::fold::noop_fold_item_simple::h3d4554c855dc58e0
  25:     0x7fa033609ab2 - <syntax::ext::expand::InvocationCollector<'a, 'b> as syntax::fold::Folder>::fold_item::h0fe28be5da841c1a
  26:     0x7fa033669276 - syntax::ext::expand::Expansion::fold_with::h4b15544e975800a7
  27:     0x7fa0336070db - syntax::ext::expand::MacroExpander::collect_invocations::h394c2a558f484088
  28:     0x7fa033603bb9 - syntax::ext::expand::MacroExpander::expand::h959b262d25638add
  29:     0x7fa033602eef - syntax::ext::expand::MacroExpander::expand_crate::h08dcfa5db99b42c9
  30:     0x7fa03360d21d - syntax::ext::expand::expand_crate::hc240d93cfea63653
  31:     0x7fa03aac82c1 - rustc_driver::driver::phase_2_configure_and_expand::{{closure}}::h2d39fc9f02dd8655
  32:     0x7fa03aa7a2a8 - rustc_driver::driver::phase_2_configure_and_expand::hb41c4aa3b639bda4
  33:     0x7fa03aa73e7e - rustc_driver::driver::compile_input::hc0edbed7edb3eb18
  34:     0x7fa03aaa3521 - rustc_driver::run_compiler::h22d678d32fb7c300
  35:     0x7fa03a9dcea3 - std::panicking::try::do_call::h4d040997e2efdaf3
  36:     0x7fa03a6d3da6 - __rust_maybe_catch_panic
  37:     0x7fa03a9fbef9 - <F as alloc::boxed::FnBox<A>>::call_box::hba0b436c79e56b23
  38:     0x7fa03a6bf9d0 - std::sys::thread::Thread::new::thread_start::h022e3887023c6290
  39:     0x7fa03298b183 - start_thread
  40:     0x7fa03a30437c - clone
  41:                0x0 - <unknown>

Build failed, waiting for other jobs to finish...
error: Could not compile `selectors`.

[wafflespeanut]

@bors-servo retry

[bors-servo]

⌛ Testing commit 2999581 with merge 76092c4...

[bors-servo]

☀️ Test successful - arm32, arm64, linux-dev, linux-rel, mac-dev-unit, mac-rel-css, mac-rel-wpt, windows-dev