(#574) Exclude all issues with label

This updates the handling on how we are excluding labels when generating
release notes.
This allows issues to be assigned with a normal label, but still be
excluded if a different label is listed in the exclusion list.

Previously you would need to add and remove labels between drafting a
release notes.

src/GitReleaseManager.Core/ReleaseNotes/ReleaseNotesBuilder.cs

@@ -101,7 +101,10 @@ public async Task<string> BuildReleaseNotesAsync(string user, string repository,
         private Dictionary<string, List<Issue>> GetIssuesDict(List<Issue> issues)
         {
             var issueLabels = _configuration.IssueLabelsInclude;
+            var excludedIssueLabels = _configuration.IssueLabelsExclude;
+
             var issuesByLabel = issues
+                .Where(o => !o.Labels.Any(l => excludedIssueLabels.Any(eil => string.Equals(eil, l.Name, StringComparison.OrdinalIgnoreCase))))
                 .SelectMany(o => o.Labels, (issue, label) => new { Label = label.Name, Issue = issue })
                 .Where(o => issueLabels.Any(il => string.Equals(il, o.Label, StringComparison.OrdinalIgnoreCase)))
                 .GroupBy(o => o.Label, o => o.Issue)
@@ -136,16 +139,21 @@ private string GetValidLabel(string label, int issuesCount)
             foreach (var issue in issues)
             {
                 var includedIssuesCount = 0;
-                var excludedIssuesCount = 0;
+                var isExcluded = false;
 
                 foreach (var issueLabel in issue.Labels)
                 {
                     includedIssuesCount += _configuration.IssueLabelsInclude.Count(issueToInclude => issueLabel.Name.ToUpperInvariant() == issueToInclude.ToUpperInvariant());
 
-                    excludedIssuesCount += _configuration.IssueLabelsExclude.Count(issueToExclude => issueLabel.Name.ToUpperInvariant() == issueToExclude.ToUpperInvariant());
+                    isExcluded = isExcluded && _configuration.IssueLabelsExclude.Any(issueToExclude => issueLabel.Name.ToUpperInvariant() == issueToExclude.ToUpperInvariant());
+                }
+
+                if (isExcluded)
+                {
+                    continue;
                 }
 
-                if (includedIssuesCount + excludedIssuesCount != 1)
+                if (includedIssuesCount != 1)
                 {
                     var allIssueLabels = _configuration.IssueLabelsInclude.Union(_configuration.IssueLabelsExclude).ToList();
                     var allIssuesExceptLast = allIssueLabels.Take(allIssueLabels.Count - 1);