fixed and unfuged test for 'chained infinite numeric sequence (with 'infix:<...>')'
The test obviously missed the constraint for the first ten elements [^10].
After adding this and after s#1/4 1/2#0.25 0.5# in the expected output the test passes.
Both changes are in analogy to the test directly above 'chained infinite numeric sequence'

If I should better leave the test as it was and open a ticket first, please let me know.
added tests for RT #120739
I'm not sure if S03-operators/subscript-adverbs.t is the right place for this tests.
Please let me know if it should go somewhere else.
added tests for RT #116348
merged two tests for RT #116348
Merge pull request #47 from usev6/master

fixed and unfuged test for chained infinite numeric sequence
added tests for RT #120739 and RT #116348