tests: avoid nested quoting on command line for portability Before this patch, test-revset.t fails on Solaris using ksh as default "sh", because nested quoting below isn't acceptable for it. +-----------------------------+ inner quoting "`python -c "print '|'.join(['0:1'] * 500)"`" +-------------------------------------------+ outer quoting This patch does below for portability. - omit outer quoting This should be safe, because generated string contains no white space character. - use '+' instead of '|' (for safety) '|' has special meaning for many shell, but '+' isn't (at least, for ordinary ones).