From 3e8e98e4a727f7d328fbb9ad6727036653fa7c4c Mon Sep 17 00:00:00 2001
From: Ben Nelson <nelson.ben.c@gmail.com>
Date: Wed, 25 Jul 2018 16:50:03 -0600
Subject: [PATCH] fix blank spaces not being caught in several cython file
 types

includes *.pyx, *.pyi, *.pyi.in, *.pyd

refs #21980
---
 ci/lint.sh                     | 32 +++++++++++++++++++++++++++++++-
 pandas/_libs/tslibs/period.pyx |  2 +-
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/ci/lint.sh b/ci/lint.sh
index 9bcee55e1344c3..b2f52e1c851e94 100755
--- a/ci/lint.sh
+++ b/ci/lint.sh
@@ -49,6 +49,13 @@ if [ "$LINT" ]; then
     if [ $? -ne "0" ]; then
         RET=1
     fi
+
+    trailing_space_pyx=$(find **/*\.pyx -type f -exec egrep -l " +$" {} \;)
+    if [[ -n $trailing_space_pyx ]]
+    then
+        RET=1
+        echo $trailing_space_pyx
+    fi
     echo "Linting *.pyx DONE"
 
     echo "Linting *.pxi.in"
@@ -60,6 +67,21 @@ if [ "$LINT" ]; then
             RET=1
         fi
     done
+
+    trailing_space_pxi_in=$(find **/*\.pxi\.in -type f -exec egrep -l " +$" {} \;)
+    if [[ -n $trailing_space_pxi_in ]]
+    then
+        RET=1
+        echo $trailing_space_pxi_in
+    fi
+
+    trailing_space_pxi=$(find **/*\.pxi -type f -exec egrep -l " +$" {} \;)
+    if [[ -n $trailing_space_pxi ]]
+    then
+        RET=1
+        echo $trailing_space_pxi
+    fi
+
     echo "Linting *.pxi.in DONE"
 
     echo "Linting *.pxd"
@@ -71,6 +93,14 @@ if [ "$LINT" ]; then
             RET=1
         fi
     done
+
+    trailing_space_pyd=$(find **/*\.pyd -type f -exec egrep -l " +$" {} \;)
+    if [[ -n $trailing_space_pyd ]]
+    then
+        RET=1
+        echo $trailing_space_pyd
+    fi
+
     echo "Linting *.pxd DONE"
 
     # readability/casting: Warnings about C casting instead of C++ casting
@@ -173,7 +203,7 @@ if [ "$LINT" ]; then
         RET=1
     fi
     echo "Check for old-style classes DONE"
-    
+
     echo "Check for backticks incorrectly rendering because of missing spaces"
     grep -R --include="*.rst" -E "[a-zA-Z0-9]\`\`?[a-zA-Z0-9]" doc/source/
 
diff --git a/pandas/_libs/tslibs/period.pyx b/pandas/_libs/tslibs/period.pyx
index cd3ce5c1a8f091..9e3d6c3975c421 100644
--- a/pandas/_libs/tslibs/period.pyx
+++ b/pandas/_libs/tslibs/period.pyx
@@ -1538,7 +1538,7 @@ cdef class _Period(object):
         See Also
         --------
         Period.year : Return the calendar year of the period.
-        
+
         Examples
         --------
         If the natural and fiscal year are the same, `qyear` and `year` will