DOC: update the pandas.date_range() docstring (#20143)
DOC: update the pandas.date_range() docstring (#20143)

* DOC: Improved the docstring of pandas.date_range()

* Change date strings to iso format

* Removed import pands in Examples docstring

* Add See Also Docstring

* Update datetimes.py

* Doctests

pratapvardhan/pandas,MJuddBooth/pandas,pandas-dev/pandas,jreback/pandas,cbertinato/pandas,rs2/pandas,pandas-dev/pandas,kdebrab/pandas,dsm054/pandas,TomAugspurger/pandas,toobaz/pandas,kdebrab/pandas,cython-testbed/pandas,pratapvardhan/pandas,amolkahat/pandas,GuessWhoSamFoo/pandas,pratapvardhan/pandas,cbertinato/pandas,louispotok/pandas,GuessWhoSamFoo/pandas,GuessWhoSamFoo/pandas,GuessWhoSamFoo/pandas,datapythonista/pandas,kdebrab/pandas,kdebrab/pandas,gfyoung/pandas,jreback/pandas,cbertinato/pandas,jreback/pandas,harisbal/pandas,jreback/pandas,harisbal/pandas,harisbal/pandas,amolkahat/pandas,cython-testbed/pandas,TomAugspurger/pandas,jorisvandenbossche/pandas,rs2/pandas,jorisvandenbossche/pandas,pandas-dev/pandas,jreback/pandas,datapythonista/pandas,cbertinato/pandas,louispotok/pandas,cython-testbed/pandas,louispotok/pandas,dsm054/pandas,toobaz/pandas,MJuddBooth/pandas,toobaz/pandas,MJuddBooth/pandas,datapythonista/pandas,jorisvandenbossche/pandas,MJuddBooth/pandas,louispotok/pandas,datapythonista/pandas,dsm054/pandas,cython-testbed/pandas,toobaz/pandas,amolkahat/pandas,MJuddBooth/pandas,jorisvandenbossche/pandas,cython-testbed/pandas,TomAugspurger/pandas,amolkahat/pandas,rs2/pandas,harisbal/pandas,pandas-dev/pandas,dsm054/pandas,gfyoung/pandas,kdebrab/pandas,gfyoung/pandas,amolkahat/pandas,gfyoung/pandas,gfyoung/pandas,GuessWhoSamFoo/pandas,rs2/pandas,pratapvardhan/pandas,pratapvardhan/pandas,louispotok/pandas,harisbal/pandas,dsm054/pandas,TomAugspurger/pandas,toobaz/pandas,cbertinato/pandas