improve MustachePath support in concat cases

[lifeart]

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[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (d87d3c0) 72.92% compared to head (e0718ac) 73.02%.
Report is 2 commits behind head on component-context-info-origin.

Additional details and impacted files

@@                        Coverage Diff                        @@
##           component-context-info-origin     #424      +/-   ##
=================================================================
+ Coverage                          72.92%   73.02%   +0.09%     
=================================================================
  Files                                 57       57              
  Lines                               4968     4989      +21     
  Branches                             979     1078      +99     
=================================================================
+ Hits                                3623     3643      +20     
- Misses                              1345     1346       +1     

Files	Coverage Δ
...uiltin-addons/core/template-completion-provider.ts	93.81% <100.00%> (+0.09%)	⬆️
src/utils/ast-helpers.ts	84.33% <93.33%> (+0.47%)	⬆️

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