rp08, some models have chain B instead of A

[tzok]

Issue concerns these models:

• 8_Chen_6_rpr.pdb
• 8_Chen_7_rpr.pdb
• 8_Chen_8_rpr.pdb
• 8_Chen_9_rpr.pdb
• 8_Chen_10_rpr.pdb

[mmagnus]

@tzok thanks!

[mm] rp08$ git:(master) ✗ rna_pdb_toolsx.py --rename-chain 'B>A' --inplace 8_Chen_10_rpr.pdb
[mm] rp08$ git:(master) ✗ rna_pdb_toolsx.py --rename-chain 'B>A' --inplace 8_Chen_[6-9]_rpr.pdb
[mm] rp08$ git:(master) ✗ head 8_Chen_10_rpr*
==> 8_Chen_10_rpr.pdb <==
REMARK 250 Model edited with rna-tools
REMARK 250  ver py2-349-gbb06958-dirty
REMARK 250  https://github.com/mmagnus/rna-tools
REMARK 250  Wed Apr 17 11:12:09 2019
ATOM      1    P   G A   1     -26.949  -2.863 -57.713  1.00  0.00           P
ATOM      2  OP1   G A   1     -26.928  -2.048 -58.949  1.00  0.00           O
ATOM      3  OP2   G A   1     -26.234  -4.145 -57.648  1.00  0.00           O
ATOM      4  O5'   G A   1     -26.893  -2.042 -56.364  1.00  0.00           O
ATOM      5  C5'   G A   1     -27.410  -0.685 -56.360  1.00  0.00           C
ATOM      6  C4'   G A   1     -27.265   0.053 -55.008  1.00  0.00           C

==> 8_Chen_10_rpr.pdb~ <==
REMARK 250 Generated with rna-pdb-tools
REMARK 250 https://github.com/mmagnus/rna-pdb-tools
REMARK 250 Fri May 12 16:41:36 2017
ATOM      1    P   G B   1     -26.949  -2.863 -57.713  1.00  0.00           P
ATOM      2  OP1   G B   1     -26.928  -2.048 -58.949  1.00  0.00           O
ATOM      3  OP2   G B   1     -26.234  -4.145 -57.648  1.00  0.00           O
ATOM      4  O5'   G B   1     -26.893  -2.042 -56.364  1.00  0.00           O
ATOM      5  C5'   G B   1     -27.410  -0.685 -56.360  1.00  0.00           C
ATOM      6  C4'   G B   1     -27.265   0.053 -55.008  1.00  0.00           C
ATOM      7  O4'   G B   1     -27.817  -0.714 -53.896  1.00  0.00           O