Fix unresolved variable usage

Author: ChronosMasterOfAllTime

libexec/goenv-version-name

@@ -26,7 +26,7 @@ version_exists() {
   local input_version="$1"
   local use_go_mod="$2"
 
-  if [[ -n use_go_mod ]] && [[ -d ${GOENV_ROOT}/versions ]] && grep -q -E "^[0-9]+\.[0-9]+\.?[0-9]*(\s*)$" <<<${input_version}; then
+  if [[ -n $use_go_mod ]] && [[ -d ${GOENV_ROOT}/versions ]] && grep -q -E "^[0-9]+\.[0-9]+\.?[0-9]*(\s*)$" <<<${input_version}; then
     OLDIFS="$IFS"
     IFS=$'\n'
     local version_regex=$(echo ${input_version} | sed s/\\./\\\\./)

libexec/goenv-which

@@ -63,7 +63,7 @@ version_exists() {
   local input_version="$1"
   local use_go_mod="$2"
 
-  if [[ -n use_go_mod ]] && [[ -d ${GOENV_ROOT}/versions ]] && grep -q -E "^[0-9]+\.[0-9]+(\s*)$" <<<${input_version}; then
+  if [[ -n $use_go_mod ]] && [[ -d ${GOENV_ROOT}/versions ]] && grep -q -E "^[0-9]+\.[0-9]+(\s*)$" <<<${input_version}; then
     OLDIFS="$IFS"
     IFS=$'\n'
     local version_regex=$(echo ${input_version} | sed s/\\./\\\\./)