Bug Fixes

1. CPSW child-device export omitted the : after the device name

   What was broken:

   • Child-device sections were emitted without valid YAML mapping syntax.

   Inputs that triggered it:

   • Exporting nested devices with the CPSW utilities.

   Result:

   • Malformed output for child-device sections.

   Fix:

   • Added the missing : after child device names.

2. CPSW export overwrote the generated file prologue

   What was broken:

   • Header/prologue content such as #once and #include was accumulated and then overwritten by later body assignment.

   Inputs that triggered it:

   • Full-file/root CPSW export.

   Result:

   • Generated files missing the expected header/include prologue.

   Fix:

   • Preserved the accumulated prefix and appended body content instead of overwriting it.