Compiler warnings have been suppressed in 'bdlb_indexspanstringutil' (#3388)
Compiler warnings have been suppressed in 'bdlb_indexspanstringutil' (#3388)

* Compiler warnings have been suppressed in 'bdlb_indexspanstringutil'

* Code review comments have been applied
bloomberg/bde,bloomberg/bde,bloomberg/bde,bloomberg/bde,bloomberg/bde