DOC: Fix typo in example (#19537)
DOC: Fix typo in example (#19537)

Fix typo in the example for pandas.io.formats.style.Styler.format
datapythonista/pandas,MJuddBooth/pandas,TomAugspurger/pandas,cbertinato/pandas,gfyoung/pandas,cython-testbed/pandas,GuessWhoSamFoo/pandas,TomAugspurger/pandas,dsm054/pandas,MJuddBooth/pandas,jreback/pandas,amolkahat/pandas,TomAugspurger/pandas,dsm054/pandas,gfyoung/pandas,jreback/pandas,cython-testbed/pandas,kdebrab/pandas,louispotok/pandas,louispotok/pandas,dsm054/pandas,MJuddBooth/pandas,amolkahat/pandas,kdebrab/pandas,cbertinato/pandas,pratapvardhan/pandas,harisbal/pandas,toobaz/pandas,pratapvardhan/pandas,kdebrab/pandas,datapythonista/pandas,rs2/pandas,harisbal/pandas,jreback/pandas,pandas-dev/pandas,rs2/pandas,jorisvandenbossche/pandas,dsm054/pandas,gfyoung/pandas,MJuddBooth/pandas,jreback/pandas,louispotok/pandas,MJuddBooth/pandas,louispotok/pandas,cython-testbed/pandas,GuessWhoSamFoo/pandas,amolkahat/pandas,GuessWhoSamFoo/pandas,pratapvardhan/pandas,pandas-dev/pandas,pratapvardhan/pandas,jreback/pandas,toobaz/pandas,pratapvardhan/pandas,cython-testbed/pandas,jorisvandenbossche/pandas,harisbal/pandas,gfyoung/pandas,amolkahat/pandas,toobaz/pandas,toobaz/pandas,pandas-dev/pandas,cbertinato/pandas,jorisvandenbossche/pandas,cbertinato/pandas,kdebrab/pandas,toobaz/pandas,dsm054/pandas,gfyoung/pandas,jorisvandenbossche/pandas,cbertinato/pandas,TomAugspurger/pandas,harisbal/pandas,pandas-dev/pandas,cython-testbed/pandas,rs2/pandas,datapythonista/pandas,kdebrab/pandas,GuessWhoSamFoo/pandas,harisbal/pandas,louispotok/pandas,GuessWhoSamFoo/pandas,datapythonista/pandas,amolkahat/pandas,rs2/pandas