DRIVERS-3254 Perfcomp Cleanup (#684)

Author: zhouselena

.evergreen/perfcomp/README.md

@@ -84,4 +84,4 @@ Alternatively, you can run the perfcomp shell script. This script will run build
 PERF_URI_PRIVATE_ENDPOINT="<perf_uri>" VERSION_ID="<version>" PROJECT="<project>" CONTEXT="<context>" TASK="<task>" VARIANT="<variant>" .evergreen/run-perf-comp.sh
 ```
 
-If you would like to see a markdown preview of the report, you can also pass in `HEAD_SHA=""`. This will generate `.evergreen/perfcomp/perf-report.md`.
+If you would like to see a markdown preview of the report, you can also pass in `HEAD_SHA="test"`. This will generate `.evergreen/perfcomp/perf-report.md`.

.evergreen/perfcomp/cmd/perfcomp/mdreport.go

@@ -64,7 +64,7 @@ func runMdCommand(cmd *cobra.Command, args []string) error {
 			version = strings.Split(line, " ")[2]
 		} else if strings.Contains(line, "Commit SHA:") {
 			// parse commit SHA and write header
-			fmt.Fprintf(fWrite, "\n<details>\n<summary><b>%s</b></summary>\n\t<br>\n\n", line)
+			fmt.Fprintf(fWrite, "\n<details open>\n<summary><b>%s</b></summary>\n\t<br>\n\n", line)
 		} else if strings.Contains(line, "version "+version) {
 			// dynamic Evergreen perf task link
 			evgLink, err = generateEvgLink(version, perfVariant)