Add short-form show for records

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.53 :warning:

Comparison is base (198d78a) 91.02% compared to head (174baf9) 90.50%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #106 +/- ## ========================================== - Coverage 91.02% 90.50% -0.53% ========================================== Files 15 15 Lines 691 695 +4 ========================================== Hits 629 629 - Misses 62 66 +4 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `90.50% <0.00%> (-0.53%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://app.codecov.io/gh/BioJulia/FASTX.jl/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia) | Coverage Δ | | |---|---|---| | [src/fasta/record.jl](https://app.codecov.io/gh/BioJulia/FASTX.jl/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia#diff-c3JjL2Zhc3RhL3JlY29yZC5qbA==) | `81.81% <0.00%> (-2.56%)` | :arrow_down: | | [src/fastq/record.jl](https://app.codecov.io/gh/BioJulia/FASTX.jl/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia#diff-c3JjL2Zhc3RxL3JlY29yZC5qbA==) | `93.57% <0.00%> (-1.75%)` | :arrow_down: |

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