/```/{ found="" }
match($0,/```{bash.*title-of-chunk/){
val=substr($0,RSTART,RLENGTH)
sub(/.*title/,"title",val)
print "#"val
val=""
found=1
next
}
found
L2BgYC97ICBmb3VuZD0iIiAgfQptYXRjaCgkMCwvYGBge2Jhc2guKnRpdGxlLW9mLWNodW5rLyl7CiAgIHZhbD1zdWJzdHIoJDAsUlNUQVJULFJMRU5HVEgpCiAgIHN1YigvLip0aXRsZS8sInRpdGxlIix2YWwpCiAgIHByaW50ICIjInZhbAogICB2YWw9IiIKICAgZm91bmQ9MQogICBuZXh0Cn0KZm91bmQ=
YGBge2Jhc2gsIHRpdGxlLW9mLWNodW5rLCBvdGhlcj1UUlVFLCBvcHRpb25zPUZBTFNFfQojIGhlcmUncyBzb21lIGJhc2ggY29kZQpibGFoX2JsYWg9JnF1b3Q7YmxhaCZxdW90OwpgYGA=
```{bash, title-of-chunk, other=TRUE, options=FALSE}
# here's some bash code
blah_blah="blah"
```