finally fix stable version bug

Author: Vlad Dumitrescu

plugins/org.erlide.runtime/src/org/erlide/runtime/runtimeinfo/RuntimeFinder.xtend

@@ -31,8 +31,6 @@ class RuntimeFinder {
 				result.add(rt)
 			}
 		}
-		println("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-		println(result)
 		return result
 	}
 
@@ -58,7 +56,8 @@ class RuntimeFinder {
 			}
 		} catch (IOException e) {
 			// ignore, kerl is not available or usable
-			ErlLogger.warn(e)
+			ErlLogger.info("kerl not found")
+			// ErlLogger.warn(e)
 		}
 		return result.map[if(split(" ", 2).length >= 2) split(" ", 2).get(1) else null].filterNull
 	}

plugins/org.erlide.runtime/src/org/erlide/runtime/runtimeinfo/RuntimeVersion.java

@@ -252,14 +252,15 @@ public int hashCode() {
     }
 
     public boolean isStable() {
-        if (update_level == null)
+        if (update_level == null) {
             return true;
+        }
         try {
-            // "rc1" is unstable, but "1" is stable
-            Integer.parseInt(update_level);
+            // "-rc1" is unstable, but ".15" is stable
+            // The first character is a separator
+            Integer.parseInt(update_level.substring(1));
             return true;
-
-        } catch (NumberFormatException e) {
+        } catch (final NumberFormatException e) {
             return false;
         }
     }

tests/org.erlide.runtime.tests/src/org/erlide/runtime/RuntimeVersionTest.java

@@ -203,4 +203,23 @@ public void compare_11c() {
         assertThat(test1.isCompatible(test2)).isEqualTo(false);
     }
 
+    @Test
+    public void stable_1() {
+        final RuntimeVersion test1 = RuntimeVersion.Serializer.parse("20.1.1");
+        assertThat(test1.isStable());
+    }
+
+    @Test
+    public void stable_2() {
+        final RuntimeVersion test1 = RuntimeVersion.Serializer.parse("20.1.1-rc1");
+        assertThat(!test1.isStable());
+    }
+
+    @Test
+    public void stable_3() {
+        final RuntimeVersion test1 = RuntimeVersion.Serializer.parse("20.1.1.2");
+        assertThat(test1.isStable());
+    }
+
+
 }