camelcase_to_snakecase: Replace spaces with underscores

…instead of stripping them.  All of the lookup tables in source-data/,
seem to expect underscores instead of spaces.

For my particular case, the region "french polynesia" isn't in
source-data/geo_regions.tsv but "french_polynesia" is.  Warnings about
this case and other country/region cases disappeared after this change.

src/utils/misc.py

@@ -8,7 +8,7 @@ def camelcase_to_snakecase(name):
     '''
     if name is not None:
         s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
-        return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower().replace(" ","")
+        return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower().replace(" ", "_")
 
 def snakecase_to_camelcase(name):
     if name is not None: