Add precisions for the help message for --extend-css
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@ -162,8 +162,9 @@ pub fn opts() -> Vec<RustcOptGroup> {
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"URL to send code snippets to", "URL")),
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stable(optflag("", "markdown-no-toc", "don't include table of contents")),
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stable(optopt("e", "extend-css",
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"to redefine some css rules with a given file to generate doc with your \
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own theme", "PATH")),
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"To add some CSS rules with a given file to generate doc with your \
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own theme. However, your theme might break if the rustdoc's generated HTML \
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changes, so be careful!", "PATH")),
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unstable(optmulti("Z", "",
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"internal and debugging options (only on nightly build)", "FLAG")),
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stable(optopt("", "sysroot", "Override the system root", "PATH")),
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