fix: certain merge commit styles fail test for merge commit

- Github PR format was not covered by the regexes

Closes #92

Author: Simon Prochazka

pkg/text/is_merge_commit.go

@@ -6,6 +6,7 @@ import (
 
 var mergeCommitRegex = regexp.MustCompile(`^Merge commit '(?P<hash>\S+)'`)
 var mergeBranchRegex = regexp.MustCompile(`^Merge branch '(?P<incoming>\w+)' into (?P<current>\S+)`)
+var mergePRRegex = regexp.MustCompile(`^Merge pull request (?P<incoming>#\d+) from (?P<current>\S+)`)
 var kodiakMergeBranchRegex = regexp.MustCompile(`^Merge (?P<incoming>\w+) into (?P<current>\S+)`)
 
 // IsMergeCommit tests message string against expected format of a merge commit and returns true/false based on it
@@ -14,9 +15,11 @@ func IsMergeCommit(message string) bool {
 
 	mergeBranchMatch := mergeBranchRegex.FindStringSubmatch(message)
 
+	mergePRMatch := mergePRRegex.FindStringSubmatch(message)
+
 	kodiakMergeBranchMatch := kodiakMergeBranchRegex.FindStringSubmatch(message)
 
-	if mergeCommitMatch != nil || mergeBranchMatch != nil || kodiakMergeBranchMatch != nil {
+	if mergeCommitMatch != nil || mergeBranchMatch != nil || mergePRMatch != nil || kodiakMergeBranchMatch != nil {
 		return true
 	}
 

pkg/text/is_merge_commit_test.go

@@ -12,6 +12,7 @@ func TestIsMergeCommit(t *testing.T) {
 		"Merge branch 'master' into three\n":                        true,
 		"Merge branch 'master' into feature/something-word":         true,
 		"Merge master into renovate/docker-alpine-3.x":              true,
+		"Merge pull request #5 from D-Nice/feat/ci":                 true,
 		"chore: something\n":                                        false,
 		"fix: test":                                                 false,
 		"fix: Kodiak style regex":                                   false,