ESCOMP
Namelist defaults with line breaks in the namelist_defaults_*.xml files need to have special handling
Brief summary of bug
The build-namelist explicitly removes newlines for settings when handled in test-mods or user-mods (in the user_nl_* files) or in CLM_NAMELIST_OPTS. However, it doesn't do this when newlines are added to the namelist_defaults XML files. In ctsm5.3.051 a new function was added to handle this for megan_specifier and drydep_list called remove_newlines.
This same issue could come up for other variables and possibly what really should happen is that this just always be done for all variables.
General bug information
CTSM version you are using: ctsm5.3.051 Does this bug cause significantly incorrect results in the model's science? No
Configurations affected: namelist defaults with values that span more than one line of text
Details of bug
See the comment here that came up when @slevis-lmwg and I discussed this:
https://github.com/ESCOMP/CTSM/pull/3125/files#r2114959780
