Fix underline length

SLTozer · SLTozer · commit 6489ef292310 · 2025-04-17T16:49:43.000+01:00
diff --git a/llvm/docs/HowToUpdateDebugInfo.rst b/llvm/docs/HowToUpdateDebugInfo.rst
@@ -172,7 +172,7 @@ dropping locations applies.
 .. _NewInstLocations:
 
 Setting locations for new instructions
-------------------------------------
+--------------------------------------
 
 Whenever a new instruction is created and there is no suitable location for that
 instruction, that location should be annotated accordingly. There are a set of
