Silence clippy warnings in spectra_xyz sub-crate.

sub_crates/spectra_xyz/src/generate_spectra_tables.py

@@ -781,6 +781,7 @@ def write_output(data_points, grid, grid_res, filename):
         f.write('#![allow(dead_code)]\n')
         f.write('#![cfg_attr(rustfmt, rustfmt_skip)]\n')
         f.write('#![allow(clippy::unreadable_literal)]\n')
+        f.write('#![allow(clippy::excessive_precision)]\n')
         f.write('\n')
         f.write('/// This is 1 over the integral over either CMF.\n')
         f.write('/// Spectra can be mapped so that xyz=(1,1,1) is converted to constant 1 by\n')

sub_crates/spectra_xyz/src/lib.rs

@@ -1,3 +1,9 @@
+// Since this is basicallt translated from C, silence a bunch of
+// clippy warnings that stem from the C code.
+#![allow(clippy::needless_return)]
+#![allow(clippy::useless_let_if_seq)]
+#![allow(clippy::cyclomatic_complexity)]
+
 extern crate float4;
 
 use float4::Float4;

sub_crates/spectra_xyz/src/spectra_tables.rs

@@ -2,6 +2,7 @@
 #![allow(dead_code)]
 #![cfg_attr(rustfmt, rustfmt_skip)]
 #![allow(clippy::unreadable_literal)]
+#![allow(clippy::excessive_precision)]
 
 /// This is 1 over the integral over either CMF.
 /// Spectra can be mapped so that xyz=(1,1,1) is converted to constant 1 by