fix quoted here heredocs

lib/bashly/concerns/indentation_helper.rb

@@ -35,7 +35,7 @@ def set_heredoc_state(line)
     end
 
     def extract_heredoc_marker(line)
-      line =~ /<<-?\s*(\w+)/ ? $1 : nil
+      line =~ /<<-?\s*['"]?(\w+)['"]?/ ? $1 : nil
     end
 
     def heredoc_closed?(line)

spec/bashly/extensions/array_spec.rb

@@ -45,6 +45,74 @@
         expect(subject.indent 2).to eq expected
       end
     end
+
+    context 'when the string contains a single quoted heredoc block' do
+      subject do
+        result = <<~SUBJECT
+          function() {
+            cat <<-'SOME_EOF_MARKER'
+          not-indented
+            indented-once
+              indented-twice
+          SOME_EOF_MARKER
+          } # indented with function() start
+        SUBJECT
+
+        result.lines
+      end
+
+      let(:expected) do
+        result = <<~SUBJECT
+            function() {
+              cat <<-'SOME_EOF_MARKER'
+          not-indented
+            indented-once
+              indented-twice
+          SOME_EOF_MARKER
+            } # indented with function() start
+        SUBJECT
+
+        result.lines
+      end
+
+      it 'does not indent it but indents everything else' do
+        expect(subject.indent 2).to eq expected
+      end
+    end
+
+    context 'when the string contains a double quoted heredoc block' do
+      subject do
+        result = <<~SUBJECT
+          function() {
+            cat <<-"SOME_EOF_MARKER"
+          not-indented
+            indented-once
+              indented-twice
+          SOME_EOF_MARKER
+          } # indented with function() start
+        SUBJECT
+
+        result.lines
+      end
+
+      let(:expected) do
+        result = <<~SUBJECT
+            function() {
+              cat <<-"SOME_EOF_MARKER"
+          not-indented
+            indented-once
+              indented-twice
+          SOME_EOF_MARKER
+            } # indented with function() start
+        SUBJECT
+
+        result.lines
+      end
+
+      it 'does not indent it but indents everything else' do
+        expect(subject.indent 2).to eq expected
+      end
+    end
   end
 
   describe '#nonuniq' do