[do not merge] zsh-compatible version of run.sh

tests/e2e_regression/run.sh

@@ -89,7 +89,7 @@ for ((i = 0; i < nCases; i++)); do
       >/tmp/pretty 2>/dev/null &&
       cp /tmp/pretty "$outDir/$name.body" || true
     # Sanitize the current timestamp out of the response header so that diffs are stable
-    sed -i -E 's/^(Date|Content-Length|Last-Modified): .*/\1: UNINTERESTING/g' "$outDir/$name.headers"
+    sed -i '' -E 's/^(Date|Content-Length|Last-Modified): .*/\1: UNINTERESTING/g' "$outDir/$name.headers"
   else
     # $param is a SQL query; fetch the DB response
     $psql -A -o /dev/stdout -c "COPY ($param) TO STDOUT CSV HEADER" | sed $'s/\r$//' >"$outDir/$name.csv" \
@@ -103,7 +103,7 @@ diff --recursive "$TEST_DIR/expected" "$outDir" >/dev/null || {
   {
     # The expected files contain a symlink, which 'git diff' cannot follow (but regular 'diff' can).
     # Create a copy of the `expected` dir with the symlink contents materialized; we'll diff against that.
-    rm -rf /tmp/nexus-e2e-expected; cp -r --dereference "$TEST_DIR/expected" /tmp/nexus-e2e-expected;
+    rm -rf /tmp/nexus-e2e-expected; cp -rL "$TEST_DIR/expected" /tmp/nexus-e2e-expected;
   }
   if [[ -t 1 ]]; then # Running in a terminal
     echo "Press enter see the diff, or Ctrl-C to abort."