To get the 'value' from '--option=value', test-lib.sh parses said
option running 'expr' with a regexp.  This involves a subshell, an
external process, and a lot of non-alphanumeric characters in the
regexp.

Use a much simpler shell parameter expansion instead to do the same.

Signed-off-by: SZEDER Gábor <sze...@ira.uka.de>
---
 t/test-lib.sh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 0b47eb6bb299..8373d5b5c900 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -208,7 +208,7 @@ do
        -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
                verbose=t; shift ;;
        --verbose-only=*)
-               verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
+               verbose_only=${1#--*=}
                shift ;;
        -q|--q|--qu|--qui|--quie|--quiet)
                # Ignore --quiet under a TAP::Harness. Saying how many tests
@@ -222,15 +222,15 @@ do
                valgrind=memcheck
                shift ;;
        --valgrind=*)
-               valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
+               valgrind=${1#--*=}
                shift ;;
        --valgrind-only=*)
-               valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
+               valgrind_only=${1#--*=}
                shift ;;
        --tee)
                shift ;; # was handled already
        --root=*)
-               root=$(expr "z$1" : 'z[^=]*=\(.*\)')
+               root=${1#--*=}
                shift ;;
        --chain-lint)
                GIT_TEST_CHAIN_LINT=1
-- 
2.8.1.99.g5d5236f

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