Hex encode the data in dump test

[madolson]

Addresses the failure here: https://github.com/valkey-io/valkey/actions/runs/13000845302/job/36259016156#step:5:7272.

This change does three things:

1. For some reason TCL 8.5 (which is used on macos) is handling \x03ba as \0xba, according to https://www.tcl-lang.org/man/tcl8.5/TclCmd/Tcl.htm#M27 so we encode "bar" using hex escapes too.
2. Fix a spacing issue.
3. Make it so that if the restore fails, it immediately errors.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.86%. Comparing base (e9b8970) to head (7c06bc2).
Report is 7 commits behind head on unstable.

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1637      +/-   ##
============================================
- Coverage     71.04%   70.86%   -0.18%     
============================================
  Files           121      121              
  Lines         65174    65176       +2     
============================================
- Hits          46304    46189     -115     
- Misses        18870    18987     +117     

see 15 files with indirect coverage changes

[zuiderkwast]

Thanks! MacOS is weird...

The comments above the changed strings were supposed to point to the right parts inside the strings, to make it easier to read the strings.

[zuiderkwast]

For some reason macos is not properly handling \x03ba. I don't know why, and couldn't find any existing issue for it. Replacing it with it's actual

I think I found it. MacOS is running TCL 8.5, right? https://www.tcl-lang.org/man/tcl8.5/TclCmd/Tcl.htm#M27

\xhh
The hexadecimal digits hh give an eight-bit hexadecimal value for the Unicode character that will be inserted. Any number of hexadecimal digits may be present; however, all but the last two are ignored (the result is always a one-byte quantity). The upper bits of the Unicode character will be 0.

This seems to have change in TCL 8.6 https://www.tcl-lang.org/man/tcl8.6/TclCmd/Tcl.htm#M27 to

\xhh
The hexadecimal digits hh (one or two of them) give an eight-bit hexadecimal value for the Unicode character that will be inserted. The upper bits of the Unicode character will be 0 (i.e., the character will be in the range U+000000–U+0000FF).

[zuiderkwast]

The reason I used catch instead of letting it fail immediately was to restore the config afterwards so even if this test case fails, it doesn't affect other test cases. Maybe that's too fancy.

[zuiderkwast]

Since you're traveling, I'll apply the suggestions and merge it so we can fix daily.