fix blank spaces not being caught in several cython file types

includes *.pyx, *.pyi, *.pyi.in, *.pyd refs #21980

Author: illegalnumbers

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/
 

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