M4,Autoconf: allow to run a subparser inside quoted area

[masatake]

input.m4:

    AC_CHECK_HEADERS([stdbool.h],
    [
	    AC_DEFINE([USE_STDBOOL_H])
    ])

output.tags:

USE_STDBOOL_H	foo.m4	/^	    AC_DEFINE([USE_STDBOOL_H])$/;"	kind:definition	line:3	language:Autoconf	roles:def	extras:subparser	end:3

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (549d884) 85.03% compared to head (9626677) 85.04%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3833   +/-   ##
=======================================
  Coverage   85.03%   85.04%           
=======================================
  Files         228      228           
  Lines       53906    53935   +29     
=======================================
+ Hits        45840    45869   +29     
  Misses       8066     8066           

Files	Coverage Δ
extra-cmds/utiltest.c	100.00% <100.00%> (ø)
main/numarray.c	33.33% <ø> (ø)
parsers/autoconf.c	97.36% <100.00%> (+0.07%)	⬆️
parsers/m4.c	94.19% <97.77%> (+0.35%)	⬆️

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