[docs] Copyedit the Data Grid cell selection page

[samuelsycamore]

Part of the ongoing auditing/editing project—prioritizing Premium and Pro feature docs after Getting Started materials.

• edits for grammar and style
• adds informative headers
• clarifies details on how to select cells
• fixes typos and improves grammar in API descriptions

[mui-bot]

Deploy preview: https://deploy-preview-16099--material-ui-x.netlify.app/

Updated pages:

• docs/data/data-grid/cell-selection/cell-selection.md

Generated by 🚫 dangerJS against 74f658f

[michelengelen]

I've never seen this - sentence connection ... is this a stylistic thing? 🤔

[samuelsycamore]

I've never seen this - sentence connection ... is this a stylistic thing? 🤔

@michelengelen I believe you're referring to the em-dash "—", which looks like a standard hyphen in a monospace font. In this context it's connecting two closely related sentences/clauses—think of it as somewhere between a comma, a colon, and a semi-colon. You can also use two of them in the middle of a sentence—almost like you're interrupting yourself—to serve as a parenthetical or emphasize a point. MUI's style guide dictates that we use em-dashes with no spaces on either side — so this one would be incorrect.

If you're on a Mac, you can type an em-dash with Shift + Option + hyphen key. Sometimes people just use two hyphens--and some word processors will automatically convert that to an em-dash.

[michelengelen]

I've never seen this - sentence connection ... is this a stylistic thing? 🤔

@michelengelen I believe you're referring to the em-dash "—", which looks like a standard hyphen in a monospace font. In this context it's connecting two closely related sentences/clauses—think of it as somewhere between a comma, a colon, and a semi-colon. You can also use two of them in the middle of a sentence—almost like you're interrupting yourself—to serve as a parenthetical or emphasize a point. MUI's style guide dictates that we use em-dashes with no spaces on either side — so this one would be incorrect.

If you're on a Mac, you can type an em-dash with Shift + Option + hyphen key. Sometimes people just use two hyphens--and some word processors will automatically convert that to an em-dash.

Thanks for the explanation @samuelsycamore ... something new learned. There is a similar pattern n German, but we do not use dashes, but rather sub-sentences (if that makes sense)