Merge pull request microsoft#201235 from microsoft/tyriar/201184

Don't clobber BASH_REMATCH in SI

Author: Tyriar

src/vs/workbench/contrib/terminal/browser/media/shellIntegration-bash.sh

@@ -217,7 +217,7 @@ __vsc_precmd() {
 
 __vsc_preexec() {
 	__vsc_initialized=1
-	if [[ ! "$BASH_COMMAND" =~ ^__vsc_prompt* ]]; then
+	if [[ ! $BASH_COMMAND == __vsc_prompt* ]]; then
 		# Use history if it's available to verify the command as BASH_COMMAND comes in with aliases
 		# resolved
 		if [ "$__vsc_history_verify" = "1" ]; then