Fixes the the majority of "The the" in chat messages (Part 1)

[SabreML]

(Part 1/3 because there's about 100 files in total and it's easier to review if they're split up.)
Part 1: <You are here!>
Part 2: #5121
Part 3: #5139

About the pull request

Fixes instances of "The the item" and "A the item" in chat messages so that they display as "The item" and "A item" instead.

These were caused by DM's built-in Text Macros system either being used incorrectly, or used unintentionally.

DM outputs for various inputs:

---

/obj/improper_noun
	name = "test object"

var/obj/improper_noun/T = new()
"The [T] is formatted"          // Outputs as "The the test object is formatted"
"The [T.name] is formatted"     // Outputs as "The test object is formatted"
"\The [T] is formatted"         // Outputs as "The test object is formatted"
"\The [T.name] is formatted"    // Outputs as "The test object is formatted"
"A [T] is formatted"            // Outputs as "A the test object is formatted"
"A [T.name] is formatted"       // Outputs as "A test object is formatted"
"\A [T] is formatted"           // Outputs as "A test object is formatted"
"\A [T.name] is formatted"      // Outputs as "A test object is formatted"

/obj/proper_noun
	name = "Test Object"

var/obj/proper_noun/T = new()
"The [T] is formatted"          // Outputs as "The Test Object is formatted"
"The [T.name] is formatted"     // Outputs as "The Test Object is formatted"
"\The [T] is formatted"         // Outputs as "Test Object is formatted"
"\The [T.name] is formatted"    // Outputs as "Test Object is formatted"
"A [T] is formatted"            // Outputs as "A Test Object is formatted"
"A [T.name] is formatted"       // Outputs as "A Test Object is formatted"
"\A [T] is formatted"           // Outputs as "Test Object is formatted"
"\A [T.name] is formatted"      // Outputs as "Test Object is formatted"

(Code validation here in Coderbus)

---

I've tried to avoid touching anything that already works properly in-game in order to keep the PR size down, even if the manner in which it's working isn't the "correct" way (things like improper nouns being capitalised and vice versa).
I did edit the names of some items in chem_grenade.dm though, since they needed to be changed for the /obj/item/explosive/proc/toggle_blast_dampener() proc to display its message properly.

---

RegEx used:
^(?!.*(?:\/{2,}|\/\*|\* )).*?[^\\](?:the|a) \[.+\] (https://regexr.com/7o5vd)
(For search only. All replacements were done manually and I skipped a lot of false positives.)

Bad regex explanation:

^             == Beginning of the line.

(?!           == Negative lookahead START (If this group matches anything further in the line, discard this result.)
  .*          == 0 or more characters. (e.g. indentation)

  (?:         == Non-capturing group START (Capturing vs non-capturing actually makes no difference here since nothing's being replaced)
    \/{2,}    == 2 or more forward slash '/' characters ('//' or '///' at the start of the line is a comment)
    |         == OR
    \/\*      == One forward slash and an asterisk. (Block comment start)
    |         == OR
    \*        == A single asterisk followed by a space. (Middle of a block comment)
  )           == Non-capturing group END

)             == Negative lookahead END

.*?           == 0 or more characters with a 'lazy' quantifier so that it matches as few as possible.

[^\\]         == Negated character set containing a backslash. (Match any character that is not a '\'. (This filters out "\the [item]" results))

(?:           == Non-capturing group START
  the|a       == Match 'the' or 'a'. (As in "the [item]"/ "a [item]")
)             == Non-capturing group END

 \[.+\]       == Match opening and closing square brackets with 1 or more characters inside them.

Explain why it's good for the game

"Typo" fixes.

Testing Photographs and Procedure

Screenshots

(I took these screenshots before I split the PR into smaller parts and I'm posting it pretty late at night, so some of these examples might not actually be included in this PR.)
(I can take new ones later if that's requested later.)

Before:

After:

Changelog

🆑
spellcheck: Fixed instances of "The the" and "A the" in chat messages so that they're just "The" instead. (Part 1)
/:cl:

[Drulikar]

This change is generally only applicable to atom insertions (as in "some text [atom_insert] some text"). When they are either capitalized or are forced proper with \proper they won't generate a the .

You'd be better off instead changing all instances of the to \the or The to \The along with a, an, etc. See https://www.byond.com/docs/ref/#/DM/text/macros but note that the \the macros are also probably going to need to be followed by an atom insertion to behave properly.

[Drulikar]

Since I see you were already using \a in some cases, you probably already know about that behavior though. So as long as all the changes work out; its fine.

[fira]

Looks good overall