Fix may not to appropriate might not or must not

library/alloc/benches/binary_heap.rs

@@ -36,7 +36,7 @@ fn bench_peek_mut_deref_mut(b: &mut Bencher) {
         let mut peek_mut = bheap.peek_mut().unwrap();
         // The compiler shouldn't be able to optimize away the `sift_down`
         // assignment in `PeekMut`'s `DerefMut` implementation since
-        // the loop may not run.
+        // the loop might not run.
         for &i in vec.iter() {
             *peek_mut = i;
         }

library/alloc/src/collections/btree/node.rs

@@ -409,7 +409,7 @@ impl<K, V> NodeRef<marker::Dying, K, V, marker::LeafOrInternal> {
 
 impl<'a, K, V, Type> NodeRef<marker::Mut<'a>, K, V, Type> {
     /// Temporarily takes out another mutable reference to the same node. Beware, as
-    /// this method is very dangerous, doubly so since it may not immediately appear
+    /// this method is very dangerous, doubly so since it might not immediately appear
     /// dangerous.
     ///
     /// Because mutable pointers can roam anywhere around the tree, the returned
@@ -777,7 +777,7 @@ impl<BorrowType, K, V, NodeType, HandleType>
 
 impl<'a, K, V, NodeType, HandleType> Handle<NodeRef<marker::Mut<'a>, K, V, NodeType>, HandleType> {
     /// Temporarily takes out another mutable handle on the same location. Beware, as
-    /// this method is very dangerous, doubly so since it may not immediately appear
+    /// this method is very dangerous, doubly so since it might not immediately appear
     /// dangerous.
     ///
     /// For details, see `NodeRef::reborrow_mut`.

library/alloc/src/fmt.rs

@@ -138,7 +138,7 @@
 //! the `0` flag (see below) is specified for numerics, then the implicit fill character is
 //! `0`.
 //!
-//! Note that alignment may not be implemented by some types. In particular, it
+//! Note that alignment might not be implemented by some types. In particular, it
 //! is not generally implemented for the `Debug` trait.  A good way to ensure
 //! padding is applied is to format your input, then pad this resulting string
 //! to obtain your output:
@@ -300,7 +300,7 @@
 //! count := parameter | integer
 //! parameter := argument '$'
 //! ```
-//! In the above grammar, `text` may not contain any `'{'` or `'}'` characters.
+//! In the above grammar, `text` must not contain any `'{'` or `'}'` characters.
 //!
 //! # Formatting traits
 //!

library/alloc/src/rc.rs

@@ -2526,7 +2526,7 @@ unsafe fn data_offset<T: ?Sized>(ptr: *const T) -> isize {
     // SAFETY: since the only unsized types possible are slices, trait objects,
     // and extern types, the input safety requirement is currently enough to
     // satisfy the requirements of align_of_val_raw; this is an implementation
-    // detail of the language that may not be relied upon outside of std.
+    // detail of the language that must not be relied upon outside of std.
     unsafe { data_offset_align(align_of_val_raw(ptr)) }
 }
 

library/alloc/src/string.rs

@@ -921,7 +921,7 @@ impl String {
     /// assert!(s.capacity() >= 10);
     /// ```
     ///
-    /// This may not actually increase the capacity:
+    /// This might not actually increase the capacity:
     ///
     /// ```
     /// let mut s = String::with_capacity(10);
@@ -969,7 +969,7 @@ impl String {
     /// assert!(s.capacity() >= 10);
     /// ```
     ///
-    /// This may not actually increase the capacity:
+    /// This might not actually increase the capacity:
     ///
     /// ```
     /// let mut s = String::with_capacity(10);
@@ -1517,7 +1517,7 @@ impl String {
     }
 
     /// Returns the length of this `String`, in bytes, not [`char`]s or
-    /// graphemes. In other words, it may not be what a human considers the
+    /// graphemes. In other words, it might not be what a human considers the
     /// length of the string.
     ///
     /// # Examples

library/alloc/src/sync.rs

@@ -1056,8 +1056,8 @@ impl<T: ?Sized> Arc<T> {
     // Non-inlined part of `drop`.
     #[inline(never)]
     unsafe fn drop_slow(&mut self) {
-        // Destroy the data at this time, even though we may not free the box
-        // allocation itself (there may still be weak pointers lying around).
+        // Destroy the data at this time, even though we must not free the box
+        // allocation itself (there might still be weak pointers lying around).
         unsafe { ptr::drop_in_place(Self::get_mut_unchecked(self)) };
 
         // Drop the weak ref collectively held by all strong references
@@ -2587,7 +2587,7 @@ unsafe fn data_offset<T: ?Sized>(ptr: *const T) -> isize {
     // SAFETY: since the only unsized types possible are slices, trait objects,
     // and extern types, the input safety requirement is currently enough to
     // satisfy the requirements of align_of_val_raw; this is an implementation
-    // detail of the language that may not be relied upon outside of std.
+    // detail of the language that must not be relied upon outside of std.
     unsafe { data_offset_align(align_of_val_raw(ptr)) }
 }
 

library/alloc/src/vec/mod.rs

@@ -2229,7 +2229,7 @@ impl<T, A: Allocator> Vec<T, A> {
         unsafe {
             let mut ptr = self.as_mut_ptr().add(self.len());
             // Use SetLenOnDrop to work around bug where compiler
-            // may not realize the store through `ptr` through self.set_len()
+            // might not realize the store through `ptr` through self.set_len()
             // don't alias.
             let mut local_len = SetLenOnDrop::new(&mut self.len);
 

library/alloc/src/vec/source_iter_marker.rs

@@ -56,7 +56,7 @@ where
 
         let src = unsafe { iterator.as_inner().as_into_iter() };
         // check if SourceIter contract was upheld
-        // caveat: if they weren't we may not even make it to this point
+        // caveat: if they weren't we might not even make it to this point
         debug_assert_eq!(src_buf, src.buf.as_ptr());
         // check InPlaceIterable contract. This is only possible if the iterator advanced the
         // source pointer at all. If it uses unchecked access via TrustedRandomAccess

library/alloc/tests/binary_heap.rs

@@ -408,7 +408,7 @@ fn test_retain() {
 // old binaryheap failed this test
 //
 // Integrity means that all elements are present after a comparison panics,
-// even if the order may not be correct.
+// even if the order might not be correct.
 //
 // Destructors must be called exactly once per element.
 // FIXME: re-enable emscripten once it can unwind again

library/core/src/alloc/global.rs

@@ -99,7 +99,7 @@ use crate::ptr;
 ///   this trait are allowed to rely on the contracts defined on each method,
 ///   and implementors must ensure such contracts remain true.
 ///
-/// * You may not rely on allocations actually happening, even if there are explicit
+/// * You must not rely on allocations actually happening, even if there are explicit
 ///   heap allocations in the source. The optimizer may detect unused allocations that it can either
 ///   eliminate entirely or move to the stack and thus never invoke the allocator. The
 ///   optimizer may further assume that allocation is infallible, so code that used to fail due

library/core/src/future/future.rs

@@ -7,7 +7,7 @@ use crate::task::{Context, Poll};
 
 /// A future represents an asynchronous computation.
 ///
-/// A future is a value that may not have finished computing yet. This kind of
+/// A future is a value that might not have finished computing yet. This kind of
 /// "asynchronous value" makes it possible for a thread to continue doing useful
 /// work while it waits for the value to become available.
 ///

library/core/src/iter/mod.rs

@@ -336,7 +336,7 @@
 //! This will print the numbers `0` through `4`, each on their own line.
 //!
 //! Bear in mind that methods on infinite iterators, even those for which a
-//! result can be determined mathematically in finite time, may not terminate.
+//! result can be determined mathematically in finite time, might not terminate.
 //! Specifically, methods such as [`min`], which in the general case require
 //! traversing every element in the iterator, are likely not to return
 //! successfully for any infinite iterators.

library/core/src/iter/range.rs

@@ -277,7 +277,7 @@ macro_rules! step_integer_impls {
                         //
                         // Casting to isize extends the width but preserves the sign.
                         // Use wrapping_sub in isize space and cast to usize to compute
-                        // the difference that may not fit inside the range of isize.
+                        // the difference that might not fit inside the range of isize.
                         Some((*end as isize).wrapping_sub(*start as isize) as usize)
                     } else {
                         None

library/core/src/iter/traits/iterator.rs

@@ -2078,7 +2078,7 @@ pub trait Iterator {
     /// to produce a single value from it.
     ///
     /// Note: `fold()`, and similar methods that traverse the entire iterator,
-    /// may not terminate for infinite iterators, even on traits for which a
+    /// might not terminate for infinite iterators, even on traits for which a
     /// result is determinable in finite time.
     ///
     /// Note: [`reduce()`] can be used to use the first element as the initial

library/core/src/mem/mod.rs

@@ -939,7 +939,7 @@ pub fn drop<T>(_x: T) {}
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_const_unstable(feature = "const_transmute_copy", issue = "83165")]
 pub const unsafe fn transmute_copy<T, U>(src: &T) -> U {
-    // If U has a higher alignment requirement, src may not be suitably aligned.
+    // If U has a higher alignment requirement, src might not be suitably aligned.
     if align_of::<U>() > align_of::<T>() {
         // SAFETY: `src` is a reference which is guaranteed to be valid for reads.
         // The caller must guarantee that the actual transmutation is safe.

library/core/src/num/int_macros.rs

@@ -1748,7 +1748,7 @@ macro_rules! int_impl {
 
         /// Returns the logarithm of the number with respect to an arbitrary base.
         ///
-        /// This method may not be optimized owing to implementation details;
+        /// This method might not be optimized owing to implementation details;
         /// `log2` can produce results more efficiently for base 2, and `log10`
         /// can produce results more efficiently for base 10.
         ///
@@ -1856,7 +1856,7 @@ macro_rules! int_impl {
         ///
         /// Returns `None` if the number is negative or zero, or if the base is not at least 2.
         ///
-        /// This method may not be optimized owing to implementation details;
+        /// This method might not be optimized owing to implementation details;
         /// `checked_log2` can produce results more efficiently for base 2, and
         /// `checked_log10` can produce results more efficiently for base 10.
         ///

library/core/src/num/uint_macros.rs

@@ -637,7 +637,7 @@ macro_rules! uint_impl {
 
         /// Returns the logarithm of the number with respect to an arbitrary base.
         ///
-        /// This method may not be optimized owing to implementation details;
+        /// This method might not be optimized owing to implementation details;
         /// `log2` can produce results more efficiently for base 2, and `log10`
         /// can produce results more efficiently for base 10.
         ///
@@ -745,7 +745,7 @@ macro_rules! uint_impl {
         ///
         /// Returns `None` if the number is zero, or if the base is not at least 2.
         ///
-        /// This method may not be optimized owing to implementation details;
+        /// This method might not be optimized owing to implementation details;
         /// `checked_log2` can produce results more efficiently for base 2, and
         /// `checked_log10` can produce results more efficiently for base 10.
         ///

library/core/src/ops/try_trait.rs

@@ -319,7 +319,7 @@ pub trait FromResidual<R = <Self as Try>::Residual> {
     /// This should be implemented consistently with the `branch` method such
     /// that applying the `?` operator will get back an equivalent residual:
     /// `FromResidual::from_residual(r).branch() --> ControlFlow::Break(r)`.
-    /// (It may not be an *identical* residual when interconversion is involved.)
+    /// (It must not be an *identical* residual when interconversion is involved.)
     ///
     /// # Examples
     ///

library/core/src/pin.rs

@@ -159,9 +159,9 @@
 //! section needs to function correctly.
 //!
 //! Notice that this guarantee does *not* mean that memory does not leak! It is still
-//! completely okay not ever to call [`drop`] on a pinned element (e.g., you can still
+//! completely okay to not ever call [`drop`] on a pinned element (e.g., you can still
 //! call [`mem::forget`] on a <code>[Pin]<[Box]\<T>></code>). In the example of the doubly-linked
-//! list, that element would just stay in the list. However you may not free or reuse the storage
+//! list, that element would just stay in the list. However you must not free or reuse the storage
 //! *without calling [`drop`]*.
 //!
 //! # `Drop` implementation

library/core/src/ptr/const_ptr.rs

@@ -244,7 +244,7 @@ impl<T: ?Sized> *const T {
     ///
     /// This operation itself is always safe, but using the resulting pointer is not.
     ///
-    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it may not
+    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it must not
     /// be used to read or write other allocated objects.
     ///
     /// In other words, `let z = x.wrapping_offset((y as isize) - (x as isize))` does *not* make `z`
@@ -404,7 +404,7 @@ impl<T: ?Sized> *const T {
     ///
     /// [`guaranteed_ne`]: #method.guaranteed_ne
     ///
-    /// The return value may change depending on the compiler version and unsafe code may not
+    /// The return value may change depending on the compiler version and unsafe code might not
     /// rely on the result of this function for soundness. It is suggested to only use this function
     /// for performance optimizations where spurious `false` return values by this function do not
     /// affect the outcome, but just the performance.
@@ -435,7 +435,7 @@ impl<T: ?Sized> *const T {
     ///
     /// [`guaranteed_eq`]: #method.guaranteed_eq
     ///
-    /// The return value may change depending on the compiler version and unsafe code may not
+    /// The return value may change depending on the compiler version and unsafe code might not
     /// rely on the result of this function for soundness. It is suggested to only use this function
     /// for performance optimizations where spurious `false` return values by this function do not
     /// affect the outcome, but just the performance.
@@ -590,7 +590,7 @@ impl<T: ?Sized> *const T {
     ///
     /// This operation itself is always safe, but using the resulting pointer is not.
     ///
-    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it may not
+    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it must not
     /// be used to read or write other allocated objects.
     ///
     /// In other words, `let z = x.wrapping_add((y as usize) - (x as usize))` does *not* make `z`
@@ -652,7 +652,7 @@ impl<T: ?Sized> *const T {
     ///
     /// This operation itself is always safe, but using the resulting pointer is not.
     ///
-    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it may not
+    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it must not
     /// be used to read or write other allocated objects.
     ///
     /// In other words, `let z = x.wrapping_sub((x as usize) - (y as usize))` does *not* make `z`

library/core/src/ptr/mut_ptr.rs

@@ -250,7 +250,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// This operation itself is always safe, but using the resulting pointer is not.
     ///
-    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it may not
+    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it must not
     /// be used to read or write other allocated objects.
     ///
     /// In other words, `let z = x.wrapping_offset((y as isize) - (x as isize))` does *not* make `z`
@@ -419,7 +419,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// [`guaranteed_ne`]: #method.guaranteed_ne
     ///
-    /// The return value may change depending on the compiler version and unsafe code may not
+    /// The return value may change depending on the compiler version and unsafe code might not
     /// rely on the result of this function for soundness. It is suggested to only use this function
     /// for performance optimizations where spurious `false` return values by this function do not
     /// affect the outcome, but just the performance.
@@ -450,7 +450,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// [`guaranteed_eq`]: #method.guaranteed_eq
     ///
-    /// The return value may change depending on the compiler version and unsafe code may not
+    /// The return value may change depending on the compiler version and unsafe code might not
     /// rely on the result of this function for soundness. It is suggested to only use this function
     /// for performance optimizations where spurious `false` return values by this function do not
     /// affect the outcome, but just the performance.
@@ -696,7 +696,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// This operation itself is always safe, but using the resulting pointer is not.
     ///
-    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it may not
+    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it must not
     /// be used to read or write other allocated objects.
     ///
     /// In other words, `let z = x.wrapping_add((y as usize) - (x as usize))` does *not* make `z`
@@ -758,7 +758,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// This operation itself is always safe, but using the resulting pointer is not.
     ///
-    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it may not
+    /// The resulting pointer "remembers" the [allocated object] that `self` points to; it must not
     /// be used to read or write other allocated objects.
     ///
     /// In other words, `let z = x.wrapping_sub((x as usize) - (y as usize))` does *not* make `z`

library/core/src/slice/mod.rs

@@ -2274,7 +2274,7 @@ impl<T> [T] {
         self.binary_search_by(|k| f(k).cmp(b))
     }
 
-    /// Sorts the slice, but may not preserve the order of equal elements.
+    /// Sorts the slice, but might not preserve the order of equal elements.
     ///
     /// This sort is unstable (i.e., may reorder equal elements), in-place
     /// (i.e., does not allocate), and *O*(*n* \* log(*n*)) worst-case.
@@ -2309,7 +2309,7 @@ impl<T> [T] {
         sort::quicksort(self, |a, b| a.lt(b));
     }
 
-    /// Sorts the slice with a comparator function, but may not preserve the order of equal
+    /// Sorts the slice with a comparator function, but might not preserve the order of equal
     /// elements.
     ///
     /// This sort is unstable (i.e., may reorder equal elements), in-place
@@ -2364,7 +2364,7 @@ impl<T> [T] {
         sort::quicksort(self, |a, b| compare(a, b) == Ordering::Less);
     }
 
-    /// Sorts the slice with a key extraction function, but may not preserve the order of equal
+    /// Sorts the slice with a key extraction function, but might not preserve the order of equal
     /// elements.
     ///
     /// This sort is unstable (i.e., may reorder equal elements), in-place