fix problem with matches in ledger-tool

[KirillLykov]

Problem

It looks like there is a typo matches (arguments do not exist for Command but indeed for SubCommand).

Summary of Changes

Renamed to arg_matches

[jeffwashington]

doh!
lgtm

[jeffwashington]

why is there even a matches??? can we drop it or otherwise get rid of it? It has been on my mental list to consolidate the args that we use between this and validator...

[codecov]

Codecov Report

Merging #25482 (e1f1c04) into master (f9f6b94) will increase coverage by 0.0%.
The diff coverage is 72.1%.

@@            Coverage Diff            @@
##           master   #25482     +/-   ##
=========================================
  Coverage    82.0%    82.0%             
=========================================
  Files         655      620     -35     
  Lines      171822   170107   -1715     
  Branches      335        0    -335     
=========================================
- Hits       140972   139644   -1328     
+ Misses      30734    30463    -271     
+ Partials      116        0    -116     

[KirillLykov]

why is there even a matches??? can we drop it or otherwise get rid of it? It has been on my mental list to consolidate the args that we use between this and validator...

It looks like this particular tool needs more love but due to size of code base it might be a week of work. I wanted to update clap to v3 for this tool PR#24594 and that's how I found this problem -- because in clap-v3 calling is_present(arg) for invalid arg leads to panic.