Minor tweaks around documentation

[paulo-ferraz-oliveira]

Description

These are minor tweaks based on post-merge comments I had on a few recent PRs.

• I have read and understood the contributing guidelines

[paulo-ferraz-oliveira]

Here's an example of the newly generated analysis output

# src/elvis_removed_rules.erl [FAIL]
  - no_space (https://hexdocs.pm/elvis_core/no_space.html)
    - At line 15, column 18, an unexpected space was found to the left of ','.

Edit: points to https://hexdocs.pm/elvis_core/no_space.html.