fix(action): block scalar supprot for contiguous separators

Signed-off-by: Brandt Keller <brandt.keller@defenseunicorns.com>

pkg/action/action.go

@@ -162,8 +162,15 @@ func fixDocSeparators(content string) string {
 		}
 		// "---" must be at the start of a line: either idx==0 or preceded by '\n'.
 		if idx > 0 && remaining[idx-1] != '\n' {
-			b.WriteString(remaining[:idx+3])
-			remaining = remaining[idx+3:]
+			// Skip past all contiguous dashes to avoid re-examining
+			// interior dashes of a long sequence (e.g. "--------------------")
+			// as a new "---" at position 0 of the remaining buffer.
+			end := idx + 3
+			for end < len(remaining) && remaining[end] == '-' {
+				end++
+			}
+			b.WriteString(remaining[:end])
+			remaining = remaining[end:]
 			continue
 		}
 		b.WriteString(remaining[:idx+3])

pkg/action/action_test.go

@@ -484,6 +484,11 @@ func TestFixDocSeparators(t *testing.T) {
 			input:    "----more\napiVersion: v1\n",
 			expected: "---\n-more\napiVersion: v1\n",
 		},
+		{
+			name:     "long dashes in block scalar are not separators",
+			input:    "apiVersion: v1\nkind: Job\nspec:\n  containers:\n    - command:\n      - |\n        echo --------------------\n        echo done\n",
+			expected: "apiVersion: v1\nkind: Job\nspec:\n  containers:\n    - command:\n      - |\n        echo --------------------\n        echo done\n",
+		},
 	}
 
 	for _, tt := range tests {