Fix line wrapping

Author: jbrockmendel

pandas/core/frame.py

@@ -1597,8 +1597,9 @@ def to_feather(self, fname):
         from pandas.io.feather_format import to_feather
         to_feather(self, fname)
 
-    @Substitution(header='Write out column names. If a list of string is given, \
-it is assumed to be aliases for the column names')
+    @Substitution(header='Write out column names. If a list of string is '
+                         'given, it is assumed to be aliases for the column '
+                         'names')
     @Appender(fmt.docstring_to_string, indents=1)
     def to_string(self, buf=None, columns=None, col_space=None, header=True,
                   index=True, na_rep='NaN', formatters=None, float_format=None,

pandas/core/generic.py

@@ -1702,8 +1702,9 @@ def to_xarray(self):
             .. versionadded:: 0.20.0
             """
 
-    @Substitution(header='Write out column names. If a list of string is given, \
-it is assumed to be aliases for the column names.')
+    @Substitution(header='Write out column names. If a list of string is '
+                         'given, it is assumed to be aliases for the column '
+                         'names.')
     @Appender(_shared_docs['to_latex'] % _shared_doc_kwargs)
     def to_latex(self, buf=None, columns=None, col_space=None, header=True,
                  index=True, na_rep='NaN', formatters=None, float_format=None,

pandas/core/indexing.py

@@ -1,5 +1,5 @@
 # pylint: disable=W0223
-
+import textwrap
 import warnings
 import numpy as np
 from pandas.compat import range, zip
@@ -1288,13 +1288,13 @@ class _IXIndexer(_NDFrameIndexer):
 
     def __init__(self, obj, name):
 
-        _ix_deprecation_warning = """
-.ix is deprecated. Please use
-.loc for label based indexing or
-.iloc for positional indexing
+        _ix_deprecation_warning = textwrap.dedent("""
+            .ix is deprecated. Please use
+            .loc for label based indexing or
+            .iloc for positional indexing
 
-See the documentation here:
-http://pandas.pydata.org/pandas-docs/stable/indexing.html#ix-indexer-is-deprecated"""  # noqa
+            See the documentation here:
+            http://pandas.pydata.org/pandas-docs/stable/indexing.html#ix-indexer-is-deprecated""")  # noqa
 
         warnings.warn(_ix_deprecation_warning,
                       DeprecationWarning, stacklevel=3)