Use -r over -f in bash si script

-r is for 'readable', -f is for 'regular files'

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

@@ -13,21 +13,21 @@ VSCODE_SHELL_INTEGRATION=1
 # Run relevant rc/profile only if shell integration has been injected, not when run manually
 if [ "$VSCODE_INJECTION" == "1" ]; then
  if [ -z "$VSCODE_SHELL_LOGIN" ]; then
- if [ -f ~/.bashrc ]; then
+ if [ -r ~/.bashrc ]; then
  . ~/.bashrc
  fi
  else
  # Imitate -l because --init-file doesn't support it:
  # run the first of these files that exists
- if [ -f /etc/profile ]; then
+ if [ -r /etc/profile ]; then
  . /etc/profile
  fi
  # exceute the first that exists
- if [ -f ~/.bash_profile ]; then
+ if [ -r ~/.bash_profile ]; then
  . ~/.bash_profile
- elif [ -f ~/.bash_login ]; then
+ elif [ -r ~/.bash_login ]; then
  . ~/.bash_login
- elif [ -f ~/.profile ]; then
+ elif [ -r ~/.profile ]; then
  . ~/.profile
  fi
  builtin unset VSCODE_SHELL_LOGIN