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Tweak env docs a bit
The "optionally" stuff just makes things confusing.
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@ -416,7 +416,7 @@ impl Error for JoinPathsError {
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fn description(&self) -> &str { self.inner.description() }
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}
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/// Optionally returns the path to the current user's home directory if known.
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/// Returns the path to the current user's home directory if known.
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///
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/// # Unix
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///
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@ -480,8 +480,8 @@ pub fn temp_dir() -> PathBuf {
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os_imp::temp_dir()
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}
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/// Optionally returns the filesystem path to the current executable which is
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/// running but with the executable name.
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/// Returns the filesystem path to the current executable which is running but
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/// with the executable name.
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///
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/// The path returned is not necessarily a "real path" to the executable as
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/// there may be intermediate symlinks.
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