More robust env.sh | Fix conda activate if in subshell

scripts/init-submodules-no-riscv-tools-nolog.sh

@@ -157,8 +157,6 @@ if [ ! -f ./software/firemarshal/marshal-config.yaml ]; then
   echo "firesim-dir: '../../sims/firesim/'" > ./software/firemarshal/marshal-config.yaml
 fi
 
-cat << EOT >> env.sh
-# line auto-generated by init-submodules-no-riscv-tools.sh
+replace_content env.sh init-submodules "# line auto-generated by init-submodules-no-riscv-tools.sh
 __DIR="$RDIR"
-PATH=\$__DIR/software/firemarshal:\$PATH
-EOT
+PATH=\$__DIR/software/firemarshal:\$PATH"