Uniquify test case descriptions

Make check-test-cases.py pass.

Prior to this commit, there were many repeated test descriptions, but
none with the same test data and dependencies and comments, as checked
with the following command:

    for x in tests/suites/*.data; do perl -00 -ne 'warn "$ARGV: $. = $seen{$_}\n" if $seen{$_}; $seen{$_}=$.' $x; done

Wherever a test suite contains multiple test cases with the exact same
description, add " [#1]", " [#2]", etc. to make the descriptions
unique. We don't currently use this particular arrangement of
punctuation, so all occurrences of " [#" were added by this script.

I used the following ad hoc code:

import sys

def fix_test_suite(data_file_name):
    in_paragraph = False
    total = {}
    index = {}
    lines = None
    with open(data_file_name) as data_file:
        lines = list(data_file.readlines())
        for line in lines:
            if line == '\n':
                in_paragraph = False
                continue
            if line.startswith('#'):
                continue
            if not in_paragraph:
                # This is a test case description line.
                total[line] = total.get(line, 0) + 1
                index[line] = 0
            in_paragraph = True
    with open(data_file_name, 'w') as data_file:
        for line in lines:
            if line in total and total[line] > 1:
                index[line] += 1
                line = '%s [#%d]\n' % (line[:-1], index[line])
            data_file.write(line)

for data_file_name in sys.argv[1:]:
    fix_test_suite(data_file_name)
diff --git a/tests/suites/test_suite_md.data b/tests/suites/test_suite_md.data
index abd8e55..6cbdb45 100644
--- a/tests/suites/test_suite_md.data
+++ b/tests/suites/test_suite_md.data
@@ -649,11 +649,11 @@
 depends_on:MBEDTLS_SHA512_C
 mbedtls_md_hmac:"SHA384":48:"01ac59f42f8bb91d1bd10fe6990d7a87":"3caf18c476edd5615f343ac7b7d3a9da9efade755672d5ba4b8ae8a7505539ea2c124ff755ec0457fbe49e43480b3c71e7f4742ec3693aad115d039f90222b030fdc9440313691716d5302005808c07627483b916fdf61983063c2eb1268f2deeef42fc790334456bc6bad256e31fc9066de7cc7e43d1321b1866db45e905622":"1985fa2163a5943fc5d92f1fe8831215e7e91f0bff5332bc713a072bdb3a8f9e5c5157463a3bfeb36231416e65973e64"
 
-generic HMAC-SHA-384 Test Vector NIST CAVS #5
+generic HMAC-SHA-384 Test Vector NIST CAVS #5 [#1]
 depends_on:MBEDTLS_SHA512_C
 mbedtls_md_hmac:"SHA384":48:"fd74b9d9e102a3a80df1baf0cb35bace":"1a068917584813d1689ccbd0370c2114d537cdc8cc52bf6db16d5535f8f7d1ad0c850a9fa0cf62373ffbf7642b1f1e8164010d350721d798d9f99e9724830399c2fce26377e83d38845675457865c03d4a07d741a505ef028343eb29fd46d0f761f3792886998c1e5c32ac3bc7e6f08faed194b34f06eff4d5d4a5b42c481e0e":"a981eaf5de3d78b20ebd4414a4edd0657e3667cd808a0dbc430cf7252f73a5b24efa136039207bd59806897457d74e0c"
 
-generic HMAC-SHA-384 Test Vector NIST CAVS #5
+generic HMAC-SHA-384 Test Vector NIST CAVS #5 [#2]
 depends_on:MBEDTLS_SHA512_C
 mbedtls_md_hmac:"SHA384":48:"9fe794f0e26b669fa5f6883149377c6c":"6010c9745e8f1d44cfdc99e7e0fd79bc4271944c2d1d84dba589073dfc4ca5eb98c59356f60cd87bef28aeb83a832bde339b2087daf942aa1f67876c5d5ed33924bed4143bc12a2be532ccaf64daa7e2bc3c8872b9823b0533b6f5159135effe8c61545536975d7c3a61ba7365ec35f165bc92b4d19eb9156ade17dfa1bb4161":"915ae61f8754698c2b6ef9629e93441f8541bd4258a5e05372d19136cfaefc0473b48d96119291b38eb1a3cb1982a986"
 
@@ -793,11 +793,11 @@
 depends_on:MBEDTLS_SHA512_C
 md_hmac_multi:"SHA384":48:"01ac59f42f8bb91d1bd10fe6990d7a87":"3caf18c476edd5615f343ac7b7d3a9da9efade755672d5ba4b8ae8a7505539ea2c124ff755ec0457fbe49e43480b3c71e7f4742ec3693aad115d039f90222b030fdc9440313691716d5302005808c07627483b916fdf61983063c2eb1268f2deeef42fc790334456bc6bad256e31fc9066de7cc7e43d1321b1866db45e905622":"1985fa2163a5943fc5d92f1fe8831215e7e91f0bff5332bc713a072bdb3a8f9e5c5157463a3bfeb36231416e65973e64"
 
-generic multi step HMAC-SHA-384 Test Vector NIST CAVS #5
+generic multi step HMAC-SHA-384 Test Vector NIST CAVS #5 [#1]
 depends_on:MBEDTLS_SHA512_C
 md_hmac_multi:"SHA384":48:"fd74b9d9e102a3a80df1baf0cb35bace":"1a068917584813d1689ccbd0370c2114d537cdc8cc52bf6db16d5535f8f7d1ad0c850a9fa0cf62373ffbf7642b1f1e8164010d350721d798d9f99e9724830399c2fce26377e83d38845675457865c03d4a07d741a505ef028343eb29fd46d0f761f3792886998c1e5c32ac3bc7e6f08faed194b34f06eff4d5d4a5b42c481e0e":"a981eaf5de3d78b20ebd4414a4edd0657e3667cd808a0dbc430cf7252f73a5b24efa136039207bd59806897457d74e0c"
 
-generic multi step HMAC-SHA-384 Test Vector NIST CAVS #5
+generic multi step HMAC-SHA-384 Test Vector NIST CAVS #5 [#2]
 depends_on:MBEDTLS_SHA512_C
 md_hmac_multi:"SHA384":48:"9fe794f0e26b669fa5f6883149377c6c":"6010c9745e8f1d44cfdc99e7e0fd79bc4271944c2d1d84dba589073dfc4ca5eb98c59356f60cd87bef28aeb83a832bde339b2087daf942aa1f67876c5d5ed33924bed4143bc12a2be532ccaf64daa7e2bc3c8872b9823b0533b6f5159135effe8c61545536975d7c3a61ba7365ec35f165bc92b4d19eb9156ade17dfa1bb4161":"915ae61f8754698c2b6ef9629e93441f8541bd4258a5e05372d19136cfaefc0473b48d96119291b38eb1a3cb1982a986"