Fix Maven separators in docs and messages

[toinehartman]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 46%. Comparing base (18f108f) to head (750da14).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...rascalmpl/uri/file/MavenRepositoryURIResolver.java	0%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #2719   +/-   ##
=======================================
- Coverage       46%     46%   -1%     
+ Complexity    6689    6682    -7     
=======================================
  Files          795     795           
  Lines        65905   65905           
  Branches      9881    9881           
=======================================
- Hits         30737   30722   -15     
- Misses       32791   32803   +12     
- Partials      2377    2380    +3     

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