prevent excess quotes in ofPattern

[StillGreen-san]

this prevents excess quotes from appearing in the format string after replacement if %FORMAT is at the front and/or back of the pattern (see first 4 examples in table below)

this was originally part of #152 but the %NAME handling has since been solved separately, so i decided to extract that functionality

pattern	current	this
%FORMAT	'2024-4-1--10-45'	2024-4-1--10-45
%FORMATHH	'2024-4-1--10-45HH	2024-4-1--10-45HH
mm%FORMAT	mm2024-4-1--10-45'	mm2024-4-1--10-45
%NAME%FORMAT	%NAME2024-4-1--10-45'	%NAME2024-4-1--10-45
mm%FORMATHH	mm2024-4-1--10-45HH	mm2024-4-1--10-45HH
mm%NAMEM%FORMATHH	mm%NAMEM2024-4-1--10-45HH	mm%NAMEM2024-4-1--10-45HH
YYYY-MM-dd-HH	2024-04-01-10	2024-04-01-10
'text'	text	text
'text'HH	text10	text10
HH'text	IllegalArgumentException	IllegalArgumentException
text	IllegalArgumentException	IllegalArgumentException
mm%NAMEHH	45%38743919362800387439194Mon10	45%38743926363200387439264Mon10
%NAME	%38743927364100387439274Mon	%38743927364100387439274Mon
'%NAME'	%NAME	%NAME
'%FORMAT'	IllegalArgumentException	IllegalArgumentException
'%NAME'HH	%NAME10	%NAME10
'%FORMAT'HH	IllegalArgumentException	IllegalArgumentException
HH'%FORMAT%NAME'M	IllegalArgumentException	IllegalArgumentException