[Bug build/34285] New: [gdb] Codespell granularity

https://sourceware.org/bugzilla/show_bug.cgi?id=34285

            Bug ID: 34285
           Summary: [gdb] Codespell granularity
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

Initially, codespell had two levels of granularity:
- global:
  - ignore words (gdb/contrib/codespell-ignore-words.txt)
  - rewrite words (gdb/contrib/codespell-dictionary.txt)
- line:
  - ignore line (codespell:ignore)
  - ignore words in line (codespell:ignore <word1> ...)
  - as codespell:ignore, but for next line: codespell:ignore-next-line

Now we have the possibility to ignore multiple lines:
...
# How to ignore blocks of code.                                                 
ignore-multiline-regex = 'codespell:ignore-begin.*?codespell:ignore-end'
... 

But there's no possibility yet to:
- ignore a specific word in a number of lines
  (
https://github.com/codespell-project/codespell/issues/3381#issuecomment-2479046896
), or
- activate a certain dictionary for/in specific files.

Consequently we:
- put architecture-specific abbreviations (like SME) in the global ignore list,
  and
- sometimes entirely ignore large blocks of code, rather than just a particular
  word (like SCOND in gdb/arc-linux-tdep.c).

We'll need to file an upstream issue for the dictionary thing, I didn't find
and open issue for that.

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