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Fix new clippy lints (#2036)
## Issue Addressed NA ## Proposed Changes Fixes new clippy lints in the whole project (mainly [manual_strip](https://rust-lang.github.io/rust-clippy/master/index.html#manual_strip) and [unnecessary_lazy_evaluations](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_lazy_evaluations)). Furthermore, removes `to_string()` calls on literals when used with the `?`-operator.
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@@ -8,13 +8,13 @@ use types::{BeaconState, EthSpec};
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pub fn run<T: EthSpec>(matches: &ArgMatches) -> Result<(), String> {
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let path = matches
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.value_of("ssz-state")
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.ok_or_else(|| "ssz-state not specified")?
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.ok_or("ssz-state not specified")?
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.parse::<PathBuf>()
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.map_err(|e| format!("Unable to parse ssz-state: {}", e))?;
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let genesis_time = matches
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.value_of("genesis-time")
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.ok_or_else(|| "genesis-time not specified")?
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.ok_or("genesis-time not specified")?
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.parse::<u64>()
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.map_err(|e| format!("Unable to parse genesis-time: {}", e))?;
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