Avoid unicode filename

This is similar to 53e9d3e.

Over at https://github.com/cockroachdb/cockroach, we use bazel and it
chokes on this file:

```
java.io.IOException: Error extracting
[...]/com_github_maruel_panicparse_v2-v2.2.1.zip to [...]:
[...]/com_github_maruel_panicparse_v2/cmd/panic/internal/utf8/?tf8.go
(Illegal byte sequence)
```

which is why we're on a fork so far. It would be nice to avoid this.

There is an (eternal, it seems) [upstream discussion], so there is
little home of bazel starting to support non-unicode filenames.

I wonder if the loss in test coverage (if any) is acceptable in return
for avoiding build problems like the ones we've been seeing.

[upstream discussion]: bazelbuild/bazel#374

cmd/panic/internal/utf8/ùtf8.go → cmd/panic/internal/utf8/utf8.go

@@ -3,6 +3,9 @@
 // that can be found in the LICENSE file.
 
 // Package ùtf8 tests a package and function with non-ASCII names.
+//
+// The filename itself does not contain unicode as this causes issues
+// importing panicparse under bazel. For more context, see PR #78.
 package ùtf8
 
 // Strùct is a totally normal structure with a totally normal name.

stack/context_test.go

@@ -2023,7 +2023,7 @@ func testPanicUTF8(t *testing.T, s *Snapshot, b *bytes.Buffer, ppDir string) {
  ),
  // See TestCallUTF8 in stack_test.go for exercising the methods on
  // Call in this situation.
- pathJoin(ppDir, "internal", "utf8", "ùtf8.go"),
+ pathJoin(ppDir, "internal", "utf8", "utf8.go"),
  10),
  newCallLocal("main.glob..func21", Args{}, pathJoin(ppDir, "main.go"), 322),
  newCallLocal("main.main", Args{}, pathJoin(ppDir, "main.go"), 340),

stack/stack_test.go

@@ -163,11 +163,11 @@ func TestCallPkg(t *testing.T) {
  // See testPanicUTF8 in context_test.go.
  name: "UTF8",
  f: "github.com/maruel/panicparse/cmd/panic/internal/%c3%b9tf8.(*Strùct).Pànic",
- s: "/gpremote/src/github.com/maruel/panicparse/cmd/panic/internal/ùtf8/ùtf8.go",
- DirSrc: pathJoin("ùtf8", "ùtf8.go"),
- SrcName: "ùtf8.go",
- LocalSrcPath: "/gplocal/src/github.com/maruel/panicparse/cmd/panic/internal/ùtf8/ùtf8.go",
- RelSrcPath: "github.com/maruel/panicparse/cmd/panic/internal/ùtf8/ùtf8.go",
+ s: "/gpremote/src/github.com/maruel/panicparse/cmd/panic/internal/ùtf8/utf8.go",
+ DirSrc: pathJoin("ùtf8", "utf8.go"),
+ SrcName: "utf8.go",
+ LocalSrcPath: "/gplocal/src/github.com/maruel/panicparse/cmd/panic/internal/ùtf8/utf8.go",
+ RelSrcPath: "github.com/maruel/panicparse/cmd/panic/internal/ùtf8/utf8.go",
  ImportPath: "github.com/maruel/panicparse/cmd/panic/internal/ùtf8",
  Location: GOPATH,
  },