Converted all regular expression strings to raw strings. Revised code style in metadata.py.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
2 jobs for enhancement/separate_spectral_homogenization in 17 minutes and 48 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed test_gms_preprocessing #25236

00:16:47

64.0%
passed test_styles #25237

00:01:00