fix: [json5] remove lead blank lines

[tangcent]

No description provided.

[codecov-commenter]

Codecov Report

Merging #673 (18da189) into master (ac396a2) will decrease coverage by 0.294%.
The diff coverage is 68.182%.

@@               Coverage Diff               @@
##              master      #673       +/-   ##
===============================================
- Coverage     58.046%   57.752%   -0.294%     
+ Complexity      2079      2077        -2     
===============================================
  Files            242       242               
  Lines          10962     11016       +54     
  Branches        2556      2565        +9     
===============================================
- Hits            6363      6362        -1     
- Misses          3383      3431       +48     
- Partials        1216      1223        +7     

Flag	Coverage Δ
unittests	57.752% <68.182%> (-0.294%)	⬇️

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Impacted Files	Coverage Δ
...n/com/itangcent/idea/plugin/json/Json5Formatter.kt	93.162% <68.182%> (-5.929%)	⬇️
...itangcent/idea/plugin/settings/XmlSettingBinder.kt	62.500% <0.000%> (-4.167%)	⬇️
.../itangcent/idea/plugin/dialog/EasyApiSettingGUI.kt	0.000% <0.000%> (ø)

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