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Give a better error when --theme is not a CSS file

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Before:

```
error: invalid argument: "bacon.toml"
```

After:
```
error: invalid argument: "bacon.toml"
  |
  = help: arguments to --theme must be CSS files
```
This commit is contained in:
Joshua Nelson 2021-03-31 10:27:01 -04:00
parent a5029ac0ab
commit 29eb6860a8
4 changed files with 11 additions and 3 deletions
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3
src/test/rustdoc-ui/invalid-theme-name.rs Normal file
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@ -0,0 +1,3 @@
// compile-flags:--theme {{src-base}}/invalid-theme-name.rs
// error-pattern: invalid argument
// error-pattern: must have a .css extension

4
src/test/rustdoc-ui/invalid-theme-name.stderr Normal file
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@ -0,0 +1,4 @@
error: invalid argument: "$DIR/invalid-theme-name.rs"
|
= help: arguments to --theme must have a .css extension