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This series has also been squeezed into D47633 to provide an overall view.
Commit message:
To this end, we introduce the strsep_noblanks() function, designed to be
a drop-in replacement for strstep(), and use it in place of the latter.
We had taken care of calling strsep() even when the remaining sub-string
was not delimited (i.e., with empty string as its second argument), so
this commit only has mechanical replacements of existing calls.