fix pom.xml

Author: Eble

pom.xml

@@ -74,20 +74,20 @@
           <artifactId>maven-project-info-reports-plugin</artifactId>
           <version>3.0.0</version>
         </plugin>
+        <plugin>
+          <groupId>org.antlr</groupId>
+          <artifactId>antlr4-maven-plugin</artifactId>
+          <version>4.3</version>
+          <executions>
+            <execution>
+              <id>antlr</id>
+              <goals>
+                <goal>antlr4</goal>
+              </goals>
+            </execution>
+          </executions>
+        </plugin>
       </plugins>
-      <plugin>
-        <groupId>org.antlr</groupId>
-        <artifactId>antlr4-maven-plugin</artifactId>
-        <version>4.3</version>
-        <executions>
-          <execution>
-            <id>antlr</id>
-            <goals>
-              <goal>antlr4</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
     </pluginManagement>
   </build>
 </project>

src/main/antlr4/language.g4

@@ -8,7 +8,6 @@ expr:
 
      // mulDivExpr
 
-
      // sumExpr
      expr SUMOP expr #exprSumOp |
      NUMBER #exprNumber