Fix some comments

Signed-off-by: zhetaicheleba <taicheleba@outlook.com>

compiler/rustc_attr_parsing/src/attributes/mod.rs

@@ -302,7 +302,7 @@ pub(crate) trait CombineAttributeParser<S: Stage>: 'static {
     type Item;
     /// A function that converts individual items (of type [`Item`](Self::Item)) into the final attribute.
     ///
-    /// For example, individual representations fomr `#[repr(...)]` attributes into an `AttributeKind::Repr(x)`,
+    /// For example, individual representations from `#[repr(...)]` attributes into an `AttributeKind::Repr(x)`,
     ///  where `x` is a vec of these individual reprs.
     const CONVERT: ConvertFn<Self::Item>;
 

compiler/rustc_data_structures/src/graph/scc/mod.rs

@@ -289,7 +289,7 @@ enum NodeState<N, S, A: Annotation> {
 #[derive(Copy, Clone, Debug)]
 enum WalkReturn<S, A: Annotation> {
     /// The walk found a cycle, but the entire component is not known to have
-    /// been fully walked yet. We only know the minimum depth of  this
+    /// been fully walked yet. We only know the minimum depth of this
     /// component in a minimum spanning tree of the graph. This component
     /// is tentatively represented by the state of the first node of this
     /// cycle we met, which is at `min_depth`.

compiler/rustc_sanitizers/src/cfi/typeid/mod.rs

@@ -21,7 +21,7 @@ bitflags! {
         const GENERALIZE_REPR_C = 2;
         /// Normalizes integers for compatibility with Clang
         /// `-fsanitize-cfi-icall-experimental-normalize-integers` option for cross-language LLVM
-        /// CFI and  KCFI support.
+        /// CFI and KCFI support.
         const NORMALIZE_INTEGERS = 4;
         /// Do not perform self type erasure for attaching a secondary type id to methods with their
         /// concrete self so they can be used as function pointers.

compiler/rustc_trait_selection/src/error_reporting/traits/on_unimplemented.rs

@@ -309,7 +309,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
 pub struct OnUnimplementedFormatString {
     /// Symbol of the format string, i.e. `"content"`
     symbol: Symbol,
-    ///The span of the format string, i.e. `"content"`
+    /// The span of the format string, i.e. `"content"`
     span: Span,
     is_diagnostic_namespace_variant: bool,
 }