Add wrapping curly braces to ensure that the entire scripts are downloaded.

If the closing curly brace isn't present, the script will error out.
diff --git a/install.sh b/install.sh
index 40087b9..ed2747b 100755
--- a/install.sh
+++ b/install.sh
@@ -2,6 +2,8 @@
 
 set -e
 
+{ # this ensures the entire script is downloaded #
+
 nvm_has() {
   type "$1" > /dev/null 2>&1
 }
@@ -241,3 +243,5 @@
 }
 
 [ "_$NVM_ENV" = "_testing" ] || nvm_do_install
+
+} # this ensures the entire script is downloaded #