[llvm] [llvm-objdump] Document selecting symbols containing commas (PR #221619)

[James Henderson via llvm-commits]

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@@ -37,12 +37,26 @@ Disassemble all sections found in the input files.
 :::
 
 :::{option} --disassemble-symbols=<symbol1[,symbol2,...]>
-:::
-
-:::{option} --disassemble=symbol1 --disassemble=symbol2 ...
 Disassemble only the specified symbols. Takes demangled symbol names when
 {option}`--demangle` is specified, otherwise takes mangled symbol names.
 Implies {option}`--disassemble`.
+
+Each argument is split on commas. To select a symbol whose name contains commas,
+use `--disassemble=<symbol>` instead.
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jh7370 wrote:

This is missing the `{option}` markup, so won't be a proper link (see the references to `--demangle` and `--disassemble` in the previous paragraph.

https://github.com/llvm/llvm-project/pull/221619