[MRG] [DOC] Minor fixes and suggestions

[ZviBaratz]

Fixed table formatting in doc/faq/index.rst and added a couple of minor suggestions to base_element.rst.

[codecov]

Codecov Report

Merging #1761 (89b2e8e) into master (8007e9c) will decrease coverage by 9.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1761      +/-   ##
==========================================
- Coverage   97.41%   88.28%   -9.14%     
==========================================
  Files          66       66              
  Lines       10837    10837              
==========================================
- Hits        10557     9567     -990     
- Misses        280     1270     +990     

Impacted Files	Coverage Δ
pydicom/pixel_data_handlers/util.py	17.93% <0.00%> (-82.07%)	⬇️
pydicom/waveforms/numpy_handler.py	20.31% <0.00%> (-79.69%)	⬇️
pydicom/encoders/gdcm.py	20.96% <0.00%> (-75.81%)	⬇️
pydicom/pixel_data_handlers/numpy_handler.py	25.67% <0.00%> (-74.33%)	⬇️
pydicom/pixel_data_handlers/gdcm_handler.py	26.01% <0.00%> (-66.67%)	⬇️
pydicom/overlays/numpy_handler.py	35.18% <0.00%> (-64.82%)	⬇️
pydicom/pixel_data_handlers/pillow_handler.py	31.73% <0.00%> (-64.43%)	⬇️
pydicom/pixel_data_handlers/rle_handler.py	36.97% <0.00%> (-63.03%)	⬇️
pydicom/pixel_data_handlers/pylibjpeg_handler.py	40.74% <0.00%> (-57.41%)	⬇️
pydicom/pixel_data_handlers/jpeg_ls_handler.py	51.11% <0.00%> (-42.23%)	⬇️
... and 11 more

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[mrbean-bremen]

Thanks!