Applying code review comments

The test will need a bit more tweaking, I'll do that in a follow-up.

Author: bsipocz

astroquery/esa/euclid/core.py

@@ -1188,7 +1188,7 @@ def get_spectrum(self, *, source_id, schema='sedm', retrieval_type="ALL", output
 
         rt = str(retrieval_type).upper()
         if rt != 'ALL' and rt not in self.__VALID_DATALINK_RETRIEVAL_TYPES:
-            raise ValueError(f"Invalid mandatory argument 'retrieval_type'. Found {retrieval_type}, "
+            raise ValueError(f"Invalid argument value for 'retrieval_type'. Found {retrieval_type}, "
                              f"expected: 'ALL' or any of {self.__VALID_DATALINK_RETRIEVAL_TYPES}")
 
         params_dict = {}

astroquery/esa/euclid/tests/test_euclidtap.py

@@ -1084,7 +1084,7 @@ def test_get_spectrum_exceptions():
 
     assert str(exc_info.value).startswith('Missing required argument')
 
-    with pytest.raises(Exception) as exc_info:
+    with pytest.raises(ValueError) as exc_info:
         tap.get_spectrum(retrieval_type='hola', source_id='2417660845403252054', schema='schema', output_file=None)
 
     assert str(exc_info.value).startswith(

docs/esa/euclid/euclid.rst

@@ -1230,7 +1230,7 @@ The following example shows how to retrieve the DataLink products (1D Spectra) a
 
   >>> files = Euclid.get_spectrum(retrieval_type='SPECTRA_BGS', source_id='2675005060662306333')
   >>> from astropy.io import fits
-  >>> print(fits.info(files[0]))
+  >>> print(fits.info(files[0]))  # doctest: +IGNORE_OUTPUT
   Filename: /home/astroquery/temp_20250225_204959/2675005060662306333.fits
   No.    Name      Ver    Type      Cards   Dimensions   Format
     0  PRIMARY       1 PrimaryHDU       4   ()