fix shell syntax error

Author: dengzhicheng03

complete/mvnw

@@ -211,7 +211,7 @@ else
     if [ "$MVNW_VERBOSE" = true ]; then
       echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
     fi
-    if [ "$MVNW_REPOURL" = true]; then
+    if [ "$MVNW_REPOURL" = true ]; then
       jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.2/maven-wrapper-0.5.2.jar"
     else
       jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.2/maven-wrapper-0.5.2.jar"