Nsryjdtyk

I have the following text:

vyāsa-prasādāc chrutavānZKL

etad guhyam ahaṁ paramZKL

yogaṁ yogeśvarāt kṛṣṇātZKL

sākṣāt kathayataḥ svayamPXY



rājan saṁsmṛtya saṁsmṛtyaZKL

saṁvādam imam adbhutamZKL

keśavārjunayoḥ puṇyaṁZKL

hṛṣyāmi ca muhur muhuḥPXY



tac ca saṁsmṛtya saṁsmṛtyaZKL

rūpam aty-adbhutaṁ hareḥZKL

vismayo me mahān rājanZKL

hṛṣyāmi ca punaḥ punaḥPXY



yatra yogeśvaraḥ kṛṣṇoZKL

yatra pārtho dhanur-dharaḥZKL

tatra śrīr vijayo bhūtirZKL

dhruvā nītir matir mamaPXY

Now i want:

vyāsa-prasādāc chrutavānZKL

etad guhyam ahaṁ paramZKL

yogaṁ yogeśvarāt kṛṣṇāt sākṣāt kathayataḥ svayamPXY



rājan saṁsmṛtya saṁsmṛtyaZKL

saṁvādam imam adbhutamZKL

keśavārjunayoḥ puṇyaṁ hṛṣyāmi ca muhur muhuḥPXY



tac ca saṁsmṛtya saṁsmṛtyaZKL

rūpam aty-adbhutaṁ hareḥZKL

vismayo me mahān rājan hṛṣyāmi ca punaḥ punaḥPXY



yatra yogeśvaraḥ kṛṣṇoZKL

yatra pārtho dhanur-dharaḥZKL

tatra śrīr vijayo bhūtir dhruvā nītir matir mamaPXY

I want to merge the last two lines in each stanza.

I am trying in sublime text:

find: (?s)ZKLn((?!.*ZKL).*PXY)

replace:  1



(?s)  for multi line search

ZKLn is ZKL and new line

((?!.*ZKL)  to search from ZKL which is before PXY otherwse there are many ZKL

.*PXY everything till PXY

the above will only replace the last instance. How to see that all four instances in four stanzas are replaced.

i have lot off such stanzas

This regex seems to work PCRE. I am not sure about sublimetext3, can you try this regex?

ZKLn(?=.*nn)

and replace it with just a single space.

Note: I have inserted two new lines after the last paragraph, so that the regex works for last paragraph as well.

Check here

Edit:
In case you want to further combine PXY line with two lines above it, you can use ZKLn and replace it with space.

But in case you want to combine all four lines into one whist removing ZKL and PXY at the end, you can use this regex,

(ZKL|PXY(n))n

and remove it with a 22

Demo

You can try this:

ZKLn(?=.*PXYnn)

It matches ZKL followed by a new line, then checks if there are a bunch of non-new-line characters followed by PXY followed by 2 new lines after that.

You can replace it with a space.

Note that for this to work for the last stanza, you need to have at least two new lines at the end of the file.

Demo

This regex should do the job:

(.+ZKLn.+ZKLn.+ZKL)n(.+PXY)

The regex matches any number of any char up to 'ZKLn'. This is repeated three times and is stored in Group 1.

Then it matches any number of any char up to 'PXY' This is stored in Group 2.

Now you replace with:

$1$2 or in some languages: 12

That will join the last two lines.

You should set the global flag.