correction of count number in fasta file

Hi
I used : [https://usegalaxy.eu/root?tool_id=toolshed.g2.bx.psu.edu/repos/devteam/fasta_compute_length/fasta_compute_length] to compute length of sequences in fasta file. The file was generated like this

c3386_g1_i2 len=1028 path=[159:0-115 79:116-1027] 984
c3389_g1_i1 len=1737 path=[1:0-1736] 1650
c3389_g2_i1 len=280 path=[3686:0-279] 268
c3391_g1_i1 len=473 path=[1:0-160 162:161-234 518:235-398 162:399-472] 455
c3391_g1_i2 len=270 path=[1:0-160 162:161-234 236:235-269] 258
c3392_g1_i1 len=397 path=[349:0-248 224:249-396] 385
c3393_g1_i1 len=223 path=[201:0-159 361:160-179 381:180-222] 209
c3397_g1_i1 len=617 path=[595:0-616] 581

Now i need to correct the count number in fasta file.Is there any tool for this purpose.