doc: fix indentation error in pim doc

[mjstapp]

Recent change to the pim user doc triggered a sphinx error; update to clear that error.

make[1]: Entering directory '/home/mjs/work/frrbgpio'
  SPHINX   doc/user/_build/.doctrees/environment.pickle
/home/mjs/work/frrbgpio/doc/user/pim.rst:450: ERROR: Unexpected indentation.

[greptile-apps]

Greptile Summary

This PR fixes a Sphinx build error in doc/user/pim.rst caused by inconsistent and incorrect indentation in the ip pim [sm | dm | sm-dm] command description, restoring clean make sphinx output.\n\n- The three mode entries (sm, dm, sm-dm) had mixed 6- and 7-space indentation, violating RST's strict indentation model and triggering a Sphinx Unexpected indentation error at line 450.\n- The fix reduces all three mode descriptions to 3-space indentation — consistent with the rest of the .. clicmd:: directive body — and inserts a blank line after The available modes of operation are: to properly introduce the sub-entries.\n- No content changes; purely a formatting/whitespace correction.

Confidence Score: 5/5

Safe to merge — single-file, whitespace-only RST fix with no content changes.

The change is minimal and purely cosmetic (indentation/blank-line adjustment in RST). It directly addresses the reported Sphinx error, introduces no new content, and the post-fix file reads correctly in context. No risk of regressions.

No files require special attention.

Important Files Changed

Filename	Overview
doc/user/pim.rst	Fixes Sphinx Unexpected indentation error by normalizing the indentation of sm, dm, and sm-dm mode descriptions to match the surrounding clicmd directive body, and adds a required blank line before the first sub-entry.

_{Reviews (1): Last reviewed commit: "doc: fix indentation error in pim doc" | Re-trigger Greptile}

[Jafaral]

@Mergifyio backport stable/10.6

[mergify]

backport stable/10.6

✅ Backports have been created

Details

• #21375 doc: fix indentation error in pim doc (backport #21373) has been created for branch stable/10.6