fixed typos in docs and code comments

nominatim/tokenizer/sanitizers/clean_postcodes.py

@@ -74,7 +74,7 @@ class _PostcodeSanitizer:
 
 
 def create(config: SanitizerConfig) -> Callable[[ProcessInfo], None]:
-    """ Create a housenumber processing function.
+    """ Create a function that filters postcodes by their officially allowed pattern.
     """
 
     return _PostcodeSanitizer(config)

nominatim/tokenizer/sanitizers/clean_tiger_tags.py

@@ -41,6 +41,6 @@ def _clean_tiger_county(obj: ProcessInfo) -> None:
 
 
 def create(_: SanitizerConfig) -> Callable[[ProcessInfo], None]:
-    """ Create a housenumber processing function.
+    """ Create a function that preprocesses tags from the TIGER import.
     """
     return _clean_tiger_county

nominatim/tokenizer/sanitizers/tag_analyzer_by_language.py

@@ -12,7 +12,7 @@ If a name already has an analyzer tagged, then this is kept.
 Arguments:
 
     filter-kind: Restrict the names the sanitizer should be applied to
-                 to the given tags. The parameter expects a list of
+                 the given tags. The parameter expects a list of
                  regular expressions which are matched against 'kind'.
                  Note that a match against the full string is expected.
     whitelist: Restrict the set of languages that should be tagged.