ffi/c_str.rs: Use only one space after a period ending a sentence

src/libstd/ffi/c_str.rs

@@ -49,7 +49,7 @@ use str::{self, Utf8Error};
 /// # Extracting a raw pointer to the whole C string
 ///
 /// `CString` implements a [`as_ptr`] method through the [`Deref`]
-/// trait.  This method will give you a `*const c_char` which you can
+/// trait. This method will give you a `*const c_char` which you can
 /// feed directly to extern functions that expect a nul-terminated
 /// string, like C's `strdup()`.
 ///
@@ -70,7 +70,7 @@ use str::{self, Utf8Error};
 /// Once you have the kind of slice you need (with or without a nul
 /// terminator), you can call the slice's own
 /// [`as_ptr`][slice.as_ptr] method to get a raw pointer to pass to
-/// extern functions.  See the documentation for that function for a
+/// extern functions. See the documentation for that function for a
 /// discussion on ensuring the lifetime of the raw pointer.
 ///
 /// [`Into`]: ../convert/trait.Into.html
@@ -130,8 +130,8 @@ pub struct CString {
 /// Representation of a borrowed C string.
 ///
 /// This type represents a borrowed reference to a nul-terminated
-/// array of bytes.  It can be constructed safely from a `&[`[`u8`]`]`
-/// slice, or unsafely from a raw `*const c_char`.  It can then be
+/// array of bytes. It can be constructed safely from a `&[`[`u8`]`]`
+/// slice, or unsafely from a raw `*const c_char`. It can then be
 /// converted to a Rust [`&str`] by performing UTF-8 validation, or
 /// into an owned [`CString`].
 ///
@@ -374,7 +374,7 @@ impl CString {
     /// to undefined behavior or allocator corruption.
     ///
     /// > **Note:** If you need to borrow a string that was allocated by
-    /// > foreign code, use [`CStr`].  If you need to take ownership of
+    /// > foreign code, use [`CStr`]. If you need to take ownership of
     /// > a string that was allocated by foreign code, you will need to
     /// > make your own provisions for freeing it appropriately, likely
     /// > with the foreign code's API to do that.
@@ -521,7 +521,7 @@ impl CString {
     ///
     /// The returned slice does **not** contain the trailing nul
     /// terminator, and it is guaranteed to not have any interior nul
-    /// bytes.  If you need the nul terminator, use
+    /// bytes. If you need the nul terminator, use
     /// [`as_bytes_with_nul`] instead.
     ///
     /// [`as_bytes_with_nul`]: #method.as_bytes_with_nul
@@ -1035,7 +1035,7 @@ impl CStr {
     /// Yields a [`&str`] slice if the `CStr` contains valid UTF-8.
     ///
     /// If the contents of the `CStr` are valid UTF-8 data, this
-    /// function will return the corresponding [`&str`] slice.  Otherwise,
+    /// function will return the corresponding [`&str`] slice. Otherwise,
     /// it will return an error with details of where UTF-8 validation failed.
     ///
     /// > **Note**: This method is currently implemented to check for validity
@@ -1066,7 +1066,7 @@ impl CStr {
     ///
     /// If the contents of the `CStr` are valid UTF-8 data, this
     /// function will return a [`Cow`]`::`[`Borrowed`]`(`[`&str`]`)`
-    /// with the the corresponding [`&str`] slice.  Otherwise, it will
+    /// with the the corresponding [`&str`] slice. Otherwise, it will
     /// replace any invalid UTF-8 sequences with `U+FFFD REPLACEMENT
     /// CHARACTER` and return a [`Cow`]`::`[`Owned`]`(`[`String`]`)`
     /// with the result.