Update managing-configuration-files.md

[RMDavidson]

Removed an extra space before a comma and made changes for clarity, e.g. changed one to context, in a server to within a server (for consistency with text usage above), etc.

Reload Configuration felt odd since you wouldn't say "...without reload the configuration." in the text below so I left it like you would with Troubleshooting in some instances. Maybe if it said "Reload the Configuration file" that would work.

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[ADubhlaoich]

LGTM! Some small edit suggestions, with context around them - they're things covered by guidance we have available that we proactively address whenever we work on pages.

[mjang]

@ADubhlaoich I pushed your changes -- as LGTM, but beyond scope for the PR.

[mjang]

@RMDavidson congratulations on another contribution! And for your patience with our reviews :)