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/EAPI extern/ b # if return type on single line, append next line /EAPI.*[^;]\s*$/ { N; s/\n/ / } # while unfinished argument list, append next line :loop /,$/ { N; s/\n/ /; t loop } s/ {2,}/ /g s/\s+EINA_.*/;/ s/^\s*EAPI/EAPI/p