[7.3] [DOCS] Reformat index shard stores API docs (#46504)#47526

Merged

jrodewig merged 1 commit intoelastic:7.3from jrodewig:backport/7.3/pr-46504

Oct 3, 2019

+120-25

Commits on Oct 3, 2019

[DOCS] Reformat index shard stores API docs (#46504 )
jrodewig
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