Fix docstrings and typo

freqtrade/data/__init__.py

@@ -1,3 +1,7 @@
+"""
+Module to handle data operations for freqtrade bot
+"""
+# limit what's imported when using `from freqtrad.data import *``
 __all__ = [
     'convert'
 ]

freqtrade/data/converter.py

@@ -32,7 +32,7 @@ def parse_ticker_dataframe(ticker: list) -> DataFrame:
         'volume': 'max',
     })
     frame.drop(frame.tail(1).index, inplace=True)     # eliminate partial candle
-    logger.debug('Droppling last candle')
+    logger.debug('Dropping last candle')
     return frame
 
 

freqtrade/data/history.py

@@ -1,4 +1,9 @@
-# pragma pylint: disable=missing-docstring
+"""
+Handle historic data (ohlcv).
+includes:
+* load data for a pair (or a list of pairs) from disk
+* download data from exchange and store to disk
+"""
 
 import gzip
 try: