Fixing some minor doc issues

Author: aterrel

doc/source/io.rst

@@ -1848,6 +1848,8 @@ into a flat table.
 
    json_normalize(data, 'counties', ['state', 'shortname', ['info', 'governor']])
 
+.. _io.jsonl:
+
 Line delimited json
 '''''''''''''''''''
 
@@ -1858,7 +1860,6 @@ using Hadoop or Spark.
 
 .. ipython:: python
 
-  import pandas as pd
   jsonl = '''
       {"a":1,"b":2}
       {"a":3,"b":4}

doc/source/whatsnew/v0.19.0.txt

@@ -272,7 +272,7 @@ API changes
 - ``__setitem__`` will no longer apply a callable rhs as a function instead of storing it. Call ``where`` directly to get the previous behavior. (:issue:`13299`)
 - Passing ``Period`` with multiple frequencies to normal ``Index`` now returns ``Index`` with ``object`` dtype (:issue:`13664`)
 - ``PeriodIndex.fillna`` with ``Period`` has different freq now coerces to ``object`` dtype (:issue:`13664`)
-- The ``pd.read_json`` and ``DataFrame.to_json`` has gained support for reading and writing json lines with ``lines`` option (:issue:`9180`)
+- The ``pd.read_json`` and ``DataFrame.to_json`` has gained support for reading and writing json lines with ``lines`` option see :ref:`Line delimited json <io.jsonl>` (:issue:`9180`)
 
 .. _whatsnew_0190.api.tolist: