Fix bitset comments

Author: LegNeato

crates/rustc_codegen_spirv/src/linker/ipo.rs

@@ -69,7 +69,7 @@ impl CallGraph {
     pub fn post_order(&self) -> Vec<FuncIdx> {
         let num_funcs = self.callees.len();
 
-        // FIXME(eddyb) use a properDenseBitSet.
+        // FIXME(eddyb) use a proper bitset.
         let mut visited = vec![false; num_funcs];
         let mut post_order = Vec::with_capacity(num_funcs);
 

crates/rustc_codegen_spirv/src/linker/spirt_passes/mod.rs

@@ -407,7 +407,7 @@ fn remove_unused_values_in_func(cx: &Context, func_def_body: &mut FuncDefBody) {
                                     &cx[func_at_inst.def().form].kind
                                 {
                                     // HACK(eddyb) small selection relevant for now,
-                                    // but should be extended using e.g. aDenseBitSet.
+                                    // but should be extended using e.g. a bitset.
                                     if [wk.OpNop, wk.OpCompositeInsert].contains(&spv_inst.opcode) {
                                         continue;
                                     }