Review update: Use single quote for literal comparision

Co-authored-by: Jordan Harband <[email protected]>

Author: deepakchethan

nvm.sh

@@ -529,7 +529,7 @@ nvm_ensure_version_installed() {
       nvm_err "N/A: version \"${PREFIXED_VERSION:-$PROVIDED_VERSION}\" is not yet installed."
     fi
     nvm_err ""
-    if [ "${IS_VERSION_FROM_NVMRC}" != "1" ]; then
+    if [ "${IS_VERSION_FROM_NVMRC}" != '1' ]; then
         nvm_err "You need to run \`nvm install ${PROVIDED_VERSION}\` to install and use it."
       else
         nvm_err 'You need to run `nvm install` to install and use the node version specified in `.nvmrc`.'