Rollup merge of #22329 - thiagooak:book, r=steveklabnik

 on crates and modules - replace \")\"
on more strings - improve readability of grapheme

Author: Manishearth

src/doc/trpl/crates-and-modules.md

@@ -20,7 +20,7 @@ you to partition your code within the crate itself.
 
 As an example, let's make a *phrases* crate, which will give us various phrases
 in different languages. To keep things simple, we'll stick to "greetings" and
-"farewells" as two kinds of phrases, and use English and Japanese (日本語） as
+"farewells" as two kinds of phrases, and use English and Japanese (日本語) as
 two languages for those phrases to be in. We'll use this module layout:
 
 ```text

src/doc/trpl/more-strings.md

@@ -169,8 +169,8 @@ é
 Note that `l` has the type `&str` here, since a single grapheme can consist of
 multiple codepoints, so a `char` wouldn't be appropriate.
 
-This will print out each visible character in turn, as you'd expect: first "u͔", then
-"n͈̰̎", etc. If you wanted each individual codepoint of each grapheme, you can use `.chars()`:
+This will print out each visible character in turn, as you'd expect: first `u͔`, then
+`n͈̰̎`, etc. If you wanted each individual codepoint of each grapheme, you can use `.chars()`:
 
 ```
 let s = "u͔n͈̰̎i̙̮͚̦c͚̉o̼̩̰͗d͔̆̓ͥé";