Fix diff parsing and run unit tests

.woodpecker/check.yml

@@ -13,3 +13,8 @@ pipeline:
     settings:
       file_pattern: "*.java"
       path: "app/"
+
+  test:
+    image: gradle:7.4.1
+    commands:
+      - gradle test

app/src/main/java/org/mian/gitnex/helpers/ParseDiff.java

@@ -43,6 +43,8 @@ public class ParseDiff {
 		Matcher rmMatcher = rmPattern.matcher(raw);
 		Matcher addMatcher = addPattern.matcher(raw);
 
+		if(raw.startsWith("+")) add++;
+		else if(raw.startsWith("-")) rm++;
 		while(rmMatcher.find())
 			rm++;
 		while(addMatcher.find())