Update doc with correct parameterized function syntax

[o314]

This format is not supported since a long time.
Should we remap Associative to AbstractDict too ?

[codecov]

Codecov Report

Merging #336 (2833533) into master (f93688a) will decrease coverage by 0.87%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #336      +/-   ##
==========================================
- Coverage   99.51%   98.63%   -0.88%     
==========================================
  Files           5        5              
  Lines         410      441      +31     
==========================================
+ Hits          408      435      +27     
- Misses          2        6       +4     

Impacted Files	Coverage Δ
src/Parser.jl	100.00% <ø> (ø)
src/JSON.jl	20.00% <0.00%> (-80.00%)	⬇️
src/specialized.jl	100.00% <0.00%> (ø)
src/Writer.jl	98.26% <0.00%> (+0.13%)	⬆️

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[singularitti]

Hi, I guess you should also align the first line like parse(str::AbstractString; with the rest of the lines.

[o314]

This should be done now.
Nota that mentions to Associative have not been reviewed