t4216: use an '&&'-chain

In a759bfa (t4216: add end to end tests for git log with Bloom
filters, 2020-04-06), a 'rm' invocation was added without a
corresponding '&&' chain.

When 'trace.perf' already exists, everything works fine. However, the
function can be executed without 'trace.perf' on disk (eg., when the
subset of tests run is altered with '--run'), and so the bare 'rm'
complains about a missing file.

To remove some noise from the test log, invoke 'rm' with '-f', at which
point it is sensible to place the 'rm -f' in an '&&'-chain, which is
both (1) our usual style, and (2) avoids a broken chain in the future if
more commands are added at the beginning of the function.

Helped-by: Eric Sunshine <[email protected]>
Helped-by: Jeff King <[email protected]>
Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ttaylorr

t/t4216-log-bloom.sh

@@ -53,7 +53,7 @@ sane_unset GIT_TRACE2_PERF_BRIEF
 sane_unset GIT_TRACE2_CONFIG_PARAMS
 
 setup () {
-	rm "$TRASH_DIRECTORY/trace.perf"
+	rm -f "$TRASH_DIRECTORY/trace.perf" &&
 	git -c core.commitGraph=false log --pretty="format:%s" $1 >log_wo_bloom &&
 	GIT_TRACE2_PERF="$TRASH_DIRECTORY/trace.perf" git -c core.commitGraph=true log --pretty="format:%s" $1 >log_w_bloom
 }